This is a list of Known Bugs And Glitches currently in-game. If you find a bug, please list it below to allow others to see.
N.B.: Just because a bug can be exploited doesn't mean it should be exploited. Duplicating items may make the game easier, but it's a good idea to consider not doing so if it makes the game less fun for you.
Note that if you find out something isn't a bug, you should remove it, not just say it isn't a bug. Also, make sure to state what platform you are on, as well as the version, and don't just say 'latest version.' That can confuse people viewing in the future. Lastly, for now you should say "Switch Version," not just "Console Version" because the Switch does not have the same updates as other consoles.
On old gen console swinging certain weapons will spawn a critter for example, swinging a reaver shark pickaxe spawns tree nymph butterflies (I don't know if this was fixed I have not played in a long time)
On desktop, if you use a gravity potion, then stand on an ash block from underneath, it's particles will continuously appear.
On desktop if an npc is sitting on a chair then you talk to them then sit in the chair, it will appear you are sitting on the npc's lap.
Sometimes on console (unknown for other platforms) Using the Solar Eruption or Terrarian causes character and all projectiles to slow down to around one frame per second. Can be exploited using Cross Necklace or Star Veil to give long portions of invincibility.
On the Console, when placing a tile on the Extractinator with a Builder Potionbuff, or an accessory equipped that increases building speed, the placed tile will stay in your inventory, and will still give you the items from the Extractinator.
When using Mothron Wings, you can fly through a one-block wide and one-block tall hole, above them at a fast speed. Note that it isn't tested with other wings, and may just be bugging because there's a tree next to the hole.
On the Mobile Version, if you're using Angel Wings and Lightning Boots together, in some cases, you can fly from one half of the world to the other half of the world, without stopping.
If you place three platforms of any kind in front and behind a door(any door) and hammer each one twice, holding down allows you to walk through it.
On the 3DS Version, if you have Spectre Armor equipped in your armor slots, if you're in the inventory, it will say that everything that uses mana has a cost of zero. If you switch the slot you've selected, it will go into the negatives.
Changing from one biome to another will rarely cause the first biomes' background music to play along with the current one. This particularly occurs with the Underground, Hallow, and Glowing Mushroom Biomes.
Sometimes a world will go back to a previous save (normally the last time you were on) and you cannot recover it. The player and Events are unaffected.
If there are connection issues within a multiplayer server, it may cause mobs to appear bigger than their actual hit-box.
Sometimes King Slime and other Slimes will clip through 1 block wide walls. The reason may be due to lag.
Jumping towards a ◥-shaped stone block and placing a torch on it will sometimes result in the player going through the block into the ground above it.
Certain hats cause the player's nose to disappear.
Certain hardmode items may drop before hardmode begins, depending on the world's seed.
For a while now, sometimes the map will turn mostly black (no known fix, for now)
As of 1.3.0.7, sometimes wyverns and harpies will spawn close to surface level. However, this is not confirmed. (It may just be that the surface is high enough in the sky.)
If the player places a torch on the wall while water is falling the torch will not break. This is either a bug or because the water has holes in it.
Sometimes the player may have their stats set to a high number after dying or re logging while the server is saving.
Sometimes the player cannot access any Crafting stations.
There is a bug caused by the player automatically climbing short hills which causes the player to sometimes go through blocks (see this image).
If a player walks into a half-block with a slope on top of it, the player will partially sink into the ground.
Placing a Music Box on two Wood Platforms then erasing the platforms will cause the Music Box to float.
Rarely, placing a Torch on corrupted blocks simply causes it to vanish inexplicably.
The item value has no space between for example Gold and Silver coins.
Hermes Boots, Spectre Boots, and the like can allow the player to fall through gaps in the floor one square wide, if they run into a wall just above it fast enough.
Placing two Doors adjacent to one another and repeatedly opening and shutting them may lead to one of the two doors glitching, which results in spawning an infinite number of duplicate doors whenever the adjacent door opens or closes.
Though extremely tedious, it is possible to exploit this glitch to earn significant amounts of gold, as each stack of 99 doors is worth nearly 40 silver.
Fall damage is inconsistent when landing on anything 1 block (sometimes more) thick.
It is possible to use the Grappling Hook or its variants to go through spaces which are normally too tight to fit through.
If a Giant Worm attacks the player while they are near a one-block wide tower of sand, they may be knocked through the tower.
Occasionally, clicking the GUI opened for a Sign can cause the game to crash and pull up a .NET error message.
Floating piggy bank
Chest spawned on platform
Chests will float if the sand they were place on is removed, though not from directly under it. The sand must fall by removing the tiles below it.
It is possible for the player to walk through a closed door:
Close the door, and move as close as possible to the door.
Open it, tap the 'move right' key once very quickly, close the door, and move farther into the door.
You should not notice even a pixel's worth of movement if you
A spawn glitch when you open a world.
do this correctly.
This can also be achieved if using the active/inactive stone blocks or Actuators, and a switch. Stand in the blocks whilst they're inactive, and then flick the switch.
Sometimes, "<player name>" will appear instead of a regular Death Message.
This appears to be replicated most easily by attempting to smash a Demon Altar prior to defeating the Wall of Flesh.
Stepping on a Detonator which is wired to Explosives will cause death. However it may delete the items in your Vanity slots. Confirmed using Spectre Armor.
Sometimes, when you open a world, you will end up spawning inside a wall near your spawnpoint. To get around this you can use a Magic Mirror or try exiting and re entering your world.
When there is a Chest surrounded by thorns, breaking the chest before the thorns around it may make several extra chests appear upon destroying the thorns themselves.
Painting an overworld Glowing Mushroom tree will change the texture to wood
If you place a bottle on a wood platform and place a torch next to it, the torch will break and some torch particles will appear.
Very rarely, a buff from a potion will last longer than intended.
If the player dies while fighting the Frost Legion on Mediumcore, they will drop coins like with any other mobs. However, if platinum coins are dropped, then they may not show back up in the player's inventory, or the name may show up in the slot but no coin is actually visible and NPCs will not acknowledge them.
If the player attempts to launch a grappling device at the exact center of their character, then the game may crash.
Looting items used in crafting from a chest can occasionally glitch the crafting menu, allowing anything associated with the looted materials to be crafted.
When entering a world, the player can sometimes die from fall damage even though they didn't fall, regardless of fall damage canceling items.
On rare occasions, when a player attempts to close a door, it will instead be destroyed and rendered unable to be picked up.
When a player has multiple keys (that unlock Locked Chests) and attempts to open a locked chest, instead of consuming one key, all keys may be consumed.
Having a closed door at the original spawn point of a world may cause players spawning in to obtain two doors when the door is broken.
Sometimes an endless night without a moon may occur.
This can be fixed by exiting and re-entering the world.
Sometimes, in Hard Mode, a message appears stating that the world has been blessed with one of the three ores (Cobalt, Mythril, Adamantite, or their alternate versions) even though no Demon Altar has been destroyed.
Attempting to place a Campfire into Honey causes a duplication glitch.
On some computers, adjusting the music is impossible. Clicking the - on the music won't do anything, clicking the + will increase the sound. Also, clicking - or + on the sound will both decrease the sound.
On some computers that use small monitors, the EXIT button is unavailable due to the size of the window. The only way to get around this is to switch to fullscreen.
If a player falls while they are lagging, light and shadows will not load properly.
Heart Crystals can occasionally be found balanced on one block rather than two. In cases like this, placing a chest under the crystal and then removing it again will leave a corner of the chest behind. Attempting to place a chest there will now spawn duplicated chests.
Very rarely, if only half of a demon altar has spawned, it can be destroyed with a hammer other than the Pwnhammer.
Whenever you tab to your desktop while it's raining, instead of no sound being heard, you can still hear the sound of the rain.
Sometimes, whenever you die, a death message will appear saying that the player was slain by a weapon. Ex: "Red was destroyed by Meowmere" this is not a bug, just a certain enemy from the lunar events
When beginning to charge the Charged Blaster Cannon or the Last Prism, the audio for using the Golden Shower plays for a little while. This is not a bug, just that the devs did not make a new soundclip.
While using the Sniper Scope, Binoculars, Etc, if the camera is moved far enough away from a campfire or a block of the like, the player will not receive a buff from them until the camera is moved back in range of the blocks. Note: this also happens with Mana Lamps and Banners as well.
Lighting for boulders is not correct.
If you wear headphones while playing and disconnect them, there's a chance that you will no longer hear any audio from the games.
In 1.3, using any wings or boot wings with the Snowfrosted debuff, the player will need to fly with the wings, while flying, they should stop, jump and the hold down and stop it there. If done correctly, the player will freeze and be able to hover.
To perform this glitch, boss checklist must be enabled, after, open the boss log with L or the book in the inventory, after, you need to right click on a nearby chest while the boss log is open, and performs the glitch, this also causes sequence breaks like the Rage, Adrenaline, Charge, Poisonous and Stealth meters to overlap the boss log.
Singleplayer[]
On mobile, if you use the magic mirror, and your house is wooden, the wood won't be visible. You will though be able to stand, grapple, and jump on it. (Tested once on kindle)
Note the Npcs, items, and the player are standing on invisible wood.
As of 1.3, you can select an item in your inventory, and hold T and exit, it will be thrown on the ground, but the initial item will still be there.
Fixed in version 1.3.1
If the player opens their inventory and clicks an item during their character's attack animation, the item in question will be unable to be put down and will be dropped when the inventory is exited. (Note that this will only happen when autopause is on.)
Creating a world can sometimes crash the game and partially or completely corrupt the character file.
It is possible to drink an unlimited number of Potions without activating the Potion Sickness debuff (Note: this glitch requires Autopause to be enabled.):
Swing any weapon or tool and pause the game right in the middle of the swing (fairly easy to do if the weapon has a high use time).
Select the healing item by left-clicking or right-clicking the item of your choice.
Unpause the game and your character will interrupt the swing and instead consume the healing item.
There is a possibility where you might "eat" items this way where certain items are consumed when you pause the game and accidentally select an item with a different intention while swinging.
It is impossible to place tables and other Furniture above a certain height.
If the player and an NPC open a door at the same time, the door disappears.
With frame skip off and in windowed mode, clicking the Terraria taskbar icon to minimize the window will cause the game to drastically speed up.
Chests' contents sometimes disappear.
Opening a door while wiring over the door opens it simultaneously, the door will disappear. Verify
When an Npc tries to open a door when there is a painting on the other side, the door and the painting will drop and the door will turn into a flesh door.
When switching out your current wings (not in social slot) with Red's Wings while still flying at the same time, the player will be able to "re-charge" their flight because of Red's Wings ability to fly infinitely. (Note that the player might take minor damage by doing this.) (this has been patched since 1.3.0.1)
Using the Magic Mirror just before death, then being hit whilst you are being teleported, will result in death, but you will not drop any money/ items.
When putting armor in a chest and exiting out, it may disappear.
Chests disappear if immediately left game after placing. (with things in them)
Sometimes, when buying things from vendor NPCs, the player will be allowed to craft some items without having to be next to a crafting station. (Only works with autopause.) For example, if the player has cogs in their inventory and buys empty bullets from the Arms Dealer, once the player places the empty bullets in their inventory WITHOUT closing it afterward, they will be able to craft high velocity bullets without ever being next to a workbench. Please note that autopause must be enabled for this to work.
If the player attempts to choose a character the game might have a chance to crash.
Very rarely a glitch will happen that makes you unable to open any of your chest until you break them. Also when you break the chest everything that was in it will be erased.
Dying while Moon Lord's death animation results him dropping no loot and keeping the sky near the death location black and blurry until the player exits the game.
Opening large map (M key) and taking a screenshot (F12) will result in no mouse and hitting the inventory button brings up nothing.
Sometimes the cursor and task bar will disappear upon joining a Single player world. (Not Proven)
Sometimes the Settings menu will appear upon joining a Single player world, and you will not be able to click the buttons on it to close it. (Not Proven)
When Breaking a Fire Imp's Fire Ball it will turn into Goblin parts (3ds) (mobile unknown)
In mobile, if the guest of the world talks to the host's Angler NPC to get a quest, he will only say "(ANGLER -1)"
Occasionally, placing more than one gold key in a chest duplicates it, turning it into a stack of 99 gold keys.
If the server is laggy enough, falling a large distance (e.g., a Hellevator) may allow players to fall into areas where the map has not yet loaded. It is possible to hit the end of the world without touching any blocks in this way.
If a guest to a server places armor on a Mannequin, it will not be removed from their inventory, and will be duplicated on the mannequin. This allows for the infinite duplication of any armor already possessed.
Occasionally, when leaving and then proceeding to join the server, you may get a message saying that your character is already on the server, and you cannot join.
This can be fixed by the host of the server kicking your character from the server. You will then be allowed to rejoin.
Sometimes, your game will crash repeatedly when you try to connect to a server.
Sometimes, holes will inexplicably appear that lead to the bottom of the world. Since this does not happen in singleplayer, it is assumed to be a server-side bug.
Items that should be in expert mode, spawn in S/D chests Expert Mode
You can avoid it by placing your base near the left edge of the map from the start, as the "holes" always seem to be on the same spots every time (Example)
If you minimize the server window, time speeds up (when clicking the server window button in the task bar; might only happen on Windows 7/Vista.). It looks like the sun and moon "teleport" forward. In addition, the Monsters are super fast. Maximizing the server window fixes this.
Game may crash if you save your spawn point in a Bed and reconnect - the server must be reopened.
If the players fail to kill Skeletron, the Old Man may not respawn. The players will still get attacked by skulls in the dungeon itself. This bug seems to occur if a spawn location is set within sight of the Skeletron.
If players set a spawn point that is at the "end of the world" (past the beach and over the water) and disconnect from the server, they will be unable to reconnect. The reason for this is unknown, and the problem is fixable if the affected players connect to the world in single player and reset their spawn point.
Setting a spawn point at a high elevation (i.e. on a floating island) may cause a player to be unable to reconnect.
If you start to play on a server for a while you might get kicked and it will say "explosions are disabled on this server" and this will happen for about 10-15 minutes. It is thought to happen when players destroy many blocks within a small time frame on a lagging server and the server recognizes it as an explosion.
Eater of Worlds may spawn away from where the third shadow orb was broken, near another player in Multiplayer.
Gold Chests may not appear gold to all players. Some Gold Chests may also appear to be part gold to some players. This is fixed on reconnect.
Planted flowers may not appear the same to all players (i.e. Daybloom may look like Blinkroot and vice versa).
Shadow Orbs may not appear to be whole (i.e. a quarter shadow orb), but still act like a whole shadow orb (i.e. the quarter shadow orb summoning the Eater of Worlds)
Doors will randomly disappear in larger houses.
Very rarely, a message will appear saying you died even though you didn't, allowing the game to believe that you are "dead" and haven't respawned yet. This allows you to run around without any enemies spawning near you (be careful though, they will spawn near other players). (confirmed; happens on slightly laggy servers while surviving "On Fire!" Debuff with extremely low HP)
Continuously firing the Megashark will get you kicked by the anti-cheat mechanism.
Players may fall through a one-block hole.
Sometimes summoning a boss (tested on Eye of Cthulhu) will use up the summoning item, but the boss won't spawn.
Defeating a boss in expert-mode sometimes does not drop a treasure bag for every player. (Eater of Worlds only dropped a treasure bag for 1/2 players. Given, the second was only present for half of the fight due to his constant deaths.)
Sometimes a boss will flee after it's HP drops to 0, or it will die without giving a victory message, sound effect, or drops. (Tested on the Eye of Cthulhu, defeated twice in multiplayer, one time it ran away during the night and the other time it just died with no rewards.)
You can't stack 100 Gold Coins to make a Platinum Coin. If you try, you won't get any Platinum Coin and your Gold Coins will be gone.
If all characters are stacking their money into one source (i.e. a chest or a Piggy Bank) using the quick stack option, a player's money may occasionally fail to transfer, causing it to disappear.
When two players spam opening and closing a door, the door may break and not drop the door item. This may also happen with items such as Levers.
There is a bug that occasionally a player (that is not the host) can lose ALL items with no explainable reason. There is no known fix.
There is a bug where if there is a player in an emptied object and it is broken, the game will either crash or black out. (Unconfirmed)
Firing the Flare Gun at another player with PVP enabled will cause the player to gain the "On Fire!" debuff on the screen of the player who fired said Flare Gun. Placing the cursor over the burning player will show their health decreasing over time, but it will reset to the proper value every few seconds until the fire goes out.
When opening the menu your ambient sound can turn up to 100%.
When an player picks up an item while crashing the item may duplicate.
Placing a piece of armor in the same slot on a mannequin or womannequin immediately after another player has, can duplicate the armor placed last. Not placing it fast enough results in the item disappearing.
Sometimes using a banned item on a server will cause the stardust dragon staff to disappear from inventory and rarely Meowmere will vanish as well
On the 3ds, if you use a spear (I used the Orichalcum Trident) and swap to a chainsaw (I used Palladium) very quickly, the spear will float behind the character and fly off. (1.0.3)
Rarely on the 3ds, a save file can corrupt after unlocking hard mode, I have little information on this, though it may happen if you save and exit, close the software, then go back on whilst an update is occurring (INCONCLUSIVE)
If you use an Ice Rod on a gold/shadow chest on manual mode and using it on the bottom left/right part of it while there is anything in it will make 3-4 copies of the chest.This will mean infinite money if you sell them via a vendor of your choice.
when a chest is placed next to a door and an NPC opens the door into said chest it will duplicate the chest and the contents will be deleted
NPCs sometimes keep their housing sign up while it is not suitable. Upon reloading the world, the sign will vanish.
NPCs sometimes have pathing issues when attempting to reach their rooms, particularly obstacles over 3 squares high, which they can't jump past. If you reload the world though, they should spawn in their assigned housing.
When you spawn for the first time, the Guide can spawn twice for an unknown reason. (Needs Confirmation)
Sometimes an NPC will spawn Underground and won't be able to climb up.
When your mouse moves over Santa's banner in housing mode, it says Santa Claus the Santa Claus, instead of using the NPC's name. (Not really a glitch; the game mechanic dictates that all NPCs have a name and a type, although Santa Claus' name is his type)
If you follow an NPC as they go to open closed doors, you are able to walk through. If you follow them just as they are about to close it, the door may disappear.
Some NPCs (namely the Clothier, Old Man, the Goblin Tinkerer and the Mechanic) will walk over cliffs they can't climb back up instead of turning around.
If you have autopause on when you talk to the Mechanic, Goblin Tinker, or Wizard while they are bound underground, they will stay bound, even though they say they are unbound.
Dialogue and Purchases[]
When purchasing items from an NPC brings you down a coin tier, (1 gold coin to 99 silver, etc.) there is a chance the game will register the higher coin as still being there, though the sprite will not show and it cannot be spent.
This can be fixed by mousing over each coin space in your inventory until you find the invisible coin (the item name and amount will show) and left clicking it.
Until it is fixed, the game will attempt to stack all additional money with the nonexistent coin, resulting in lack of funds.
If you have autopause on and are close to an NPC, you will be able to talk to them as if the game was still playing, while everything around you will remain still. This can be useful if you are fighting a boss and have low health and the Nurse is near. (Singleplayer only)
Sometimes your Dryad will tell you that your world is 0% corrupt and will not tell you how much hallow there is; probably caused by the 1.1.1 update. New items that appeared after the Wall of Flesh were not purchasable, such as the Hallowed Seeds.
Also, sometimes your Dryad will say your world is 0% corrupt although there is corruption.
When a Nurse and yourself are in range of a Campfire , if you speak to her when at full health you will still be able to pay to Heal yourself, though her quote will be something like 'I've Seen Bigger Wounds'.
Fixed by simply moving the campfire away/making sure the nurse is out of range of the campfire.
Closing a dialogue with the Nurse while having the Mechanical Eye, Worm or Skull equipped causes "The Twins", "The Destroyer" or "Skeletron Prime" (respectively) to appear without consuming the item. (May also occur for other boss summoning items, needs confirmation)
If you talk to your Arms Dealer in a world where Skeletron has been defeated and the Wall of Flesh hasn't, while your guide is dead, the arms dealer will say the name of the next guide.
Monsters[]
Spawning[]
A one block high space allows Slimes to spawn, but also allows them to jump through the floor as most slimes are two blocks high.
If you make a server in pirated versions of the game and enter many times with different characters, a completely dark character will appear who will be in charge of killing the players by teleporting to them, when this happens there is no turning back since the dark character will not stop appearing in the world until it's erased.
If you stand near one of the edges of a map (left, right, top, or bottom), you can see monsters spawn on screen. This is because the monster spawning algorithm considers "offscreen" to be a certain distance from the player, rather than what the camera can actually see.
Rarely, Skeletron will be summoned randomly, kill all players near it then despawn.(But where and near what?)
The Dungeon Guardian can spawn where you respawn after it kills you.
Sometimes when you break a Shadow Orb, it doesn't say "A horrible chill goes down your spine..." Instead it will spawn the Eater of Worlds without the message "Eater of Worlds has awoken!". Also the second message "Screams echo around you" may appear causing the eater of worlds to appear after breaking a second shadow orb.
Very rarely, Harpies or Wyverns may spawn around ground level. This happens when the altitude of the ground is high enough.
Chaos Elementals can appear in the Underground Hallow even if Hard Mode is not active, causing much hassle to pre-hardmode characters. (You shouldn't have the Hallow before hardmode, anyways!)
The Celestial Towers can spawn outside of the map.
Behavioral Glitches[]
When the Wyvern is killed in multiplayer and the server is lagging, the head may still attack you even though it's already dead.
If you lead the Eye of Cthulhu up to the very top of the map, then drop down rapidly enough for the Eye to leave your screen, he may despawn.
Demon Eyes can sometimes travel through a 1 block thick layer.
Slimes, if trapped inside a 1 unit space, can travel through walls whenever it tries to jump, which allows it to follow you anywhere around the world unless it "despawns".
They can also sometimes jump through 1 unit holes, but this seems to not work when the blocks are made of certain materials, like Stone.
Some monsters drop more than one Silver Coin, but sometimes when collected it only counts as 1 Silver Coin.
The Destroyer might disappear after about 90% of its health is gone.
When you have locked in a Demon in the 'Hell' world, with dirt 4x4 blocks, it is possible for it to go through the layer of blocks that is under it. (Unconfirmed if it works with other kinds of blocks or other monsters)
Sometimes when a Demon Eye is trapped between 1 layer of blocks above it and a thick layer of blocks below it (that leads to the underground), it may sink down to the thick layer and fade away. (Dirt confirmed)
Sometimes the Wall of Flesh will drag you up to the surface and push you past the world boundaries if you survive (band of regeneration required), and crash the game.
The Golem's head can glitch out causing it to lurch or disembody itself entirely before dropping below the correct health.
Anything that can fly can be led to the top of the world and glitch out of it. (Not proven in PC.)
There will be no message saying that Turkor the Ungrateful has awoken although it will tell you when it is defeated.
The player and key glitch prevents the player from functioning correctly by glitching the players movements and making glitched noises while also disabling the players vanities, there are also some sequence breaks, like sound glitching and weapon duplicating, the keys are glitched, and they don't function properly as they get warped, and pressing ESC does not open the inventory, instead, glitches the player by disabling the wulfrum shield and stopping the player in place, the player also has the effects of the cursed debuff, even though the buff icon is glitched and dosen't display. This glitch also causes grass particles to form, which lags the game, the game can also crash from glitched noises
Map Generation[]
Jungle Shrines can be generated in lava pools with no chest inside them.
Jungle Shrines can be generated in the sky (~15 blocks above the ground)
In some map instances, it may be impossible to find certain unique items. (Intentional)
Chasms can also spawn where Dungeons should be, and sometimes block the way in. In this case, you'll need a Nightmare Pickaxe (or above) or Purification Powder to dig through it, opening the way to the Dungeon.
Corruption can sometimes be generated within 100 blocks of the main spawn upon initial map creation, without Sunflowers blocking them. These Corruptions can spread and cover the spawn.
Digging straight down from the spawn point generally leads you to a Glowing Mushroom biome. However, not always directly into the biome, but always within a screen of the biome.
Fairly often, you will also happen across one or two Demon Altars quite close to each other around sea level fairly close by the spawn point.
Dungeons can sometimes be created in a lake upon initial map creation, submerging the Dungeon entrance. Anything beyond the door of the Dungeon will not be submerged, however.
Dungeon walls may rarely be replaced with Grass Walls, preventing Dungeon enemies (including Dungeon Guardians) from spawning. The Old Man and therefore Skeletron remain accessible.
When hardmode starts with Calamity, the Astral Infection can sometimes fuse with the Hallow. This prevents the world from having a surface Hallow Biome, though it may still leave a small part of the surface Hallow, and making it impossible to fight the Empress of Light because Prismatic Lacewings cannot spawn in the Underground Hallow.
Weapons[]
The effect of Molten Armor applies sporadically to damage from the Ball o' Hurt and Harpoon. (Not yet confirmed with other flails)
If the player's inventory is full (not including ammo slots) and each of the ammo slots has at least one item in it, there is a bug where ammunition can only be picked up by temporarily displacing one of your items. The type of ammunition makes no difference, nor does what item you move momentarily. (Intentional/insurmountable programming paradox; the ammo must hit your inventory before it will go to the ammo slots)
The Dao of Pow can fall through blocks if held in one area and fly under the player if there are blocks under and if the player goes up such as flies up or grapples onto another block, the flail will come out of the ground towards the player even if the player has not gone far enough to make the flail come back to the player forcibly.(??? - Needs serious clarification)
If a player is on the bottom of the world and controls a projectile made by the rainbow rod, then guides it upward to a certain location, the rainbow rod projectile will become invisible but will still be there and if the player moves it out of the certain location downwards the projectile will become visible again.
When using a Grappling Hook, if the mouse is aimed at a Wooden Platform above the player and the E key is pressed, then the icon for the Grappling hook in the Hotkeys will disappear when the player grapples to the platform. One must open and close the inventory screen once to fix this.
When the player is next to a 1 block thick wall, or a door, and throws a boomerang at it, if the player throws the boomerang in the right direction it will go through the wall or door.
On the Xbox version of Terraria, the Vilethorn doesn't shoot a projectile, yet instead the projectile stays in place for a while, but still hurts enemies like normal.
If a Dao of Pow reforged to a certain modifier enters water, it will drop down a layer under the water. (Unconfirmed; modifier unknown)
When using the Terrarian YoYo in 1.3, having too fast of a Melee Speed and equipping the Fire Gauntlet can cause it to bug out, creating afterimages of the YoYo itself, and making it hard to use. Other YoYo's that don't spawn projectiles just jerk out when you try to keep them in place. Decreasing your Melee Speed and un-equipping the Fire Gauntlet fixes this glitch.
On mobile, if you use a spear while running backwards, it will go out of your hand, but will still do damage.
In extremely rare cases, when night starts, especially with a lot of mods enabled, there is a chance that you will not be able to use any whips at night from 7:30 PM to 4:30 AM, making the nights harder and will not go away unless restarted.
This is a simple glitch that requires you to use the Glorious End, you must equip the thing that makes projectiles home in and then come in contact with an enemy and then let the star explode and press left click. If done correctly, the player's wings and balloons will be misplaced.
Water and Other Liquids[]
It is possible for a small puddle of water to turn into a never-ending waterfall when the bottom is dug out.
An infinite pool of liquid can be made with a "J" dug into the ground by placing said liquid in the center, taking it out of the shallower side, and repeating.
Pumps toggled fast enough will duplicate whatever liquid you have them moving.
As of 1.1, water stuck in blocks will disappear if the server is empty or if the game is shut down.
As of 1.1, if a player flies into a block with water stuck in it, the player's breath meter will pop and the player could die if they stood still flying on the block while their health goes down after their breath is gone.
If a player tries to grapple on a block with water stuck inside it, preferably glass, the hook will detach from the block before the player can get to it. This can also happen on side blocks and propels the player towards the blocks.
When you dig any block under water the water will duplicate causing it to be able to flood hell/underworld because the new water does not apply the water fading in the underworld.
There is also a chance as of the 1.2 update there is a chance when you break a hellforge for water to spawn.
Sometimes small puddles of ghost water is generated. This water will float in place and block any other water from flowing. Re-entering the world will fix this.
Crashing[]
The game crashes upon exit from the title screen on some games.
Exiting out of a world and entering a different one can crash the game (unknown if this has been fixed yet)
The game crashes when inventory/a storage space is viewed(Multiplayer)
This is fixed by going to your own world and moving something in your inventory around.
If the game crashes unexpectedly, is then restarted and the same world reloaded, sometimes all blocks are removed and the player falls directly to the bottom of the map causing them to die. All world data appears gone and is irretrievable although map files still exist.
In this case, you can either use Cloud in a Bottle or Rocket Boots to survive the fall at the bottom when the screen no longer centers on your character.
Hellbats will spawn out of the bottom of the screen and pools of lava can be found in Hellstone, along with Hellforges.
Further exploration has shown that not all blocks in the rest of the world have disappeared, though most have. There will be large amounts of dirt and stone with minerals spread throughout it, but suddenly cuts off at the point where the rest of the world seems to have disappeared.
If your world name has over one word, it will put a underscore between the words.
Putting a laptop to sleep by closing it while in-game can sometimes cause it to crash when you save and quit.
Sometimes, when attempting to save and/or exit the game, Windows will notify you that Terraria has encountered an error and needs to close, and thus you will lose any unsaved changes.
The cause is suspected to involve the player character, as you can fix the bug by logging in with a different character, saving, and then switching back to the character you were previously using. People who often use multiple characters likely won't encounter this bug.
The above bug may also be caused by duplicate world files for the same world slot, and cannot be fixed, only affecting one world.
In which case you should go to your computer's start menu and search the file (formatted as world1 or world2 etc.) and delete the .sav file of the affected worlds, this may delete the world if you select the wrong duplicate (recommended to back up computer before this) but will un-glitch all further instances of this bug.
If on server, selecting an item sometimes makes the game crash.
Sometimes when right-clicking items in a chest or in the inventory, the game crashes. This is often caused by audio devices being disabled, or out of date BIOS or sound drivers.
Sometimes editing signs will cause the game to crash.
Sometimes placing armor in an armor slot will cause the game to crash if the player is using a non-English language. This is due to missing language files.
Using the rod of discord and teleporting to the right end of a large map will crash the game.
If you have many mods enabled, like Calamity, Fargo's Mod, and Cal's Expansions, the Duplication System becomes faulty, when you try to search items, it will freeze for a short time and then the search will fail. If you insert multiple letters, it will freeze for a longer time, and the duplication menu will become glitched, there will be a broken search bar and no categories or items displayed on it. When you try to go to another tab when letters are inserted, it will freeze, unfreeze, freeze, unfreeze, freeze, unfreeze, freeze, unfreeze, freeze, and the tab will continue going off and on, resulting in a softlock, this continues until it reaches a point where the game becomes faulty and cannot handle a null index, resulting in the game freezing. If the game is frozen for a certain amount of time, there is a chance for it to crash.
The player must use TL Pro and edit the ammo the Celebration MK2 uses to 0, the weapon will then not fire anything and then change to a glitched sprite, after, it will change and then shoot out numerous puppy dogs, then, after, it will begin to shoot numerous Terrarian projectiles, then, it will begin to shoot out numerous Stardust Guardians. Then, it will shoot out so many Laser Machine gun projectiles that will lag or even crash the game. Then, it will begin to act strangely, since it will shoot out a projectile with a null index, this null index can cause a crash, so, the game crashes.
Visual[]
Falling Snowflakes 'phase' through walls and the ground and don't appear to obey the same rules as raindrops (which stop when they hit a surface and won't go through solid walls or ground) - snowflakes even appear underground - seems that snowflakes are being drawn in the foreground when they should be drawn the same way as raindrops. *Fixed in 1.3.7
In the map,glass walls are pure black.
Alt-tabbing in and out rapidly can cause unusual colors. Alt-tabbing again fixes.
When playing a world for the first time there is a chance no HUD/GUI is displayed. (Can be fixed by pressing F11)
Moving to fullscreen causes all things to speed up i.e. the sun and moon move at an increased pace. It is suspected that this is because your monitor's refresh rate overwrites the game's when running it in fullscreen.
When running the game in windowed mode, clicking on another window that doesn't cover the Terraria window will cause any light from Mining Helmets and armor sets with lighting effects to vanish (does not occur in multiplayer). Clicking back into the window allows it to light correctly. This does not affect the game, as it pauses when another window is clicked.
The lighting effect of a Meteor crash site may remain even when all meteor blocks have been mined.
When Hellstone and lava stop glowing, (in The Underworld) the Rocket Boots' fire particles, the Flamelash's trail, and the Molten Armor's glow particles are no longer visible.
For unknown reasons, attack font can sometimes be distorted and glitch into unrecognizable numbers. (Example) This bug does not affect critical attack numbers, and can be fixed by simply leaving and re-entering the affected world.
When using Dynamite on Ebonstone it will explode and leave a gap for a moment, but then it looks like there was no explosion. The blocks that reappear will be solid and the ones that exploded will be trapped inside the blocks that reappeared. (May happen with other blocks; unconfirmed)
In 1.2.4 for old generation consoles who did not receive the long awaited 1.3 update, players can on that version dupe fish and not by the safe tactic but by putting fish in the bin and exiting and saving (so you have one in the bin and in your inventory). It is still not fixed as of version 1.3.5.1.
Sometimes, when changing to fullscreen and then switching back to normal, only half the game is visible.
When the game is loading tiles after just having connected to a server, alt-tabbing, or using a Magic Mirror, may cause many blocks new to the 1.2 update to be invisible for anywhere upwards of a few seconds.
Since update 1.2, Wood Platforms can be moved up and down when struck with a Hammer. However, this does not change the actual position of the platform.
For instance, placing any item over the platform, like a Clay Pot, Pink Vase or any other placeable item will place them over the original location of the platform, even if it was moved down, causing it to "float" in the air.
Sometimes the background ("Wall") when underground (rocky and mud-rocky) will start to follow you and glitch, jerking about in random motions. (This is because the 'rocky' walls are actually part of the skybox, and aren't actually back walls. Parallax affects the skybox. It's not a glitch.)
Sometimes, the background will have giant lines going across it that look all glitched out, but this only occurs in some biomes.
Turning parallax down to 0 makes it stop.
If you stand on the lower edge of a sloped block which is on top of a half block, you will appear to float.
A Water Candle displays as a Band of Regeneration when moused over in the full screen map.
Making a line of Rope at the edge of the world and holding towards the very edge will send the screen moving quickly in the opposite direction. Jumping will cancel the effect.
Applying Acid Dye to a Crimson Heart causes the effect of the dye to not load properly, thus causing black to envelop the heart as the dye's animation plays. This effect also occurs with Blue Acid Dye, and likely occurs with Red Acid Dye as well.
A glitched Zephyr Fish.
If you use any dye from the Hades family on the Zephyr Fish pet, it will only showcase the dye's effect around the back of the pet.
If you dash with a Tabi and use the Anti-Gravity Hook at the same time, the dashing effect will stay while you are moving around. This also happens with the Static Hook.
If the world is raining and you have a roof above you off-screen, rain particles will still spawn on screen.
Using multiple content mods, such as the Calamity Mod, Fargo's Mod, etc and other minor mods, they must go to a cheat with the Key Lock cheat activated and the player is holding a key to a shadow key. This causes a conflicts between the two codes. Using it, use the key and the cheat to unlock a Shadow Chest in the Underworld. The key can unlock all of the 4 corners of the chest: The first will have a Shadow color, the second will have a Golden Color, the third will have a Wooden color, and the fourth will have a glitched color like black or yellow since the game cannot find data for that corner.
Audio[]
Two themes can play at the same time if the change happens on the instant of the current song being re-looped. This will last until the theme playing before the change of day/night, location, or etc. starts a new loop.
Music stopped playing. Can start again if player moves to a different biome, playing that biome theme.
Item Cloning[]
These bugs cause you to be able to clone items. Keep in mind that cloning means duplicating. You cannot obtain items you did not already have at least one of via cloning methods.
Running two instances of Terraria[]
To clone items in Terraria single player; open 2 copies of Terraria, and in both copies, sign in with the same character. In COPY A, open WORLD A, and in COPY B, open WORLD B. In WORLD A, put ITEM X in a chest. Save and exit to the title screen and exit the game client. Open COPY B and save and exit the world. Do not close COPY B. Enter WORLD A and go into the chest you put ITEM X in. ITEM X will be in the chest and also in your inventory. {C}This method works because when you save and exit WORLD A, ITEM X is saved inside the chest. However, because you have 2 inventories opened, ITEM X will stay in your inventory in WORLD B. So, when you go into WORLD A again, you will still have ITEM X in your inventory. (Sorry about all the As and Bs)
Note: A Steam update has made running 2 instances of the same game impossible. However, you can still run 2 instances by opening any folder, and in the address bar typing "%HOMEDRIVE%\Program Files\Steam\steamapps\common\Terraria" and selecting "Terraria" or "Terraria.exe" depending on your settings. You should not have both of these(or one of them wont have an icon, and you can not run it), so deciding which should not be a problem.
Tips to copying character files and world files[]
If you decide to clone items by copy/paste world or character files, be sure to know which file is which: player1.plr appears below player1 - Copy.plr, which also appears below any subsequent copies (of which copy 2 comes at the top, and then 3, etc.) of the player file. To be sure which copy you are using (or the original), please know that the order of the characters found in the Terraria character selection screen mirrors the order found the the "Players" folder. The same is for world files.
Closing a server or disconnecting abruptly[]
Item cloning can also be performed by placing an item in a container on any server, saving the server, then starting it again. Once the player revisits the container, if they take the item, disconnect, then close the server improperly (such as alt + F4 on the server tab) without letting it save, the item can be found yet again in the container. For example:
Item is still in Player A's inventory as well as in the server.
If you have played for a long time in your current session, make sure you disconnect and then reconnect to the server before you start duplicating items, or you will lose items you obtained recently. (Because the server did not have a chance to save them.)
Duplicating with doors
Sometimes,if you place a chest in the bottom 2 blocks of a 3 block gap and place a door in the top block, opening the door will make a chest appear on the floor and the default one will still be in the same place
Mass produce items from chests, involving two players[]
You can create and mass-produce items in multiplayer from chests, to do this you require some teamwork with another player, player A puts 1 gold ore in a chest slot, player B checks the chest, player A removes the gold ore, player B can now right click the spot were the gold originally was and obtain a gold ore, he can then proceed to right click empty chest slots to increase the number of ores he has, however, these ores are nameless and can-not be used in crafting, but they can be placed on the ground then mined, now with a name and now craftable, since this can be done with any ore, all endgame items can easily be obtained after the players obtain at least one Adamantite Ore. It should also be noted that players are able to sell the nameless items for the same worth of the item being duplicated, letting players duplicate endless diamonds for consistent coins, dropping any nameless items results in the item being randomly made into something else with exactly the same number in the stack but is still nameless. (As of 1.1, two players cannot be looking in the same chest. This glitch is no longer possible.)
Duplicating entire worlds[]
The second easiest way to clone items is to simply clone the item world file. This can be done by opening the Start Menu, going to Documents, going to My Games, then clicking the Terraria folder, then the World folder, then copying the world file, pasting it in the World folder you are already looking at, and then renaming it as another world. This can only be done if you have less than 5 worlds. For example if you only have 1 world the World folder will say, "world1.wld" and "world1.wld.bak". You can copy world1.wld and paste it again and it will be named "world1 - Copy.wld". Rename this as "world2.wld" and then exit the folder and start Terraria. The game will assume this is just your second world file but it will really be an exact copy of your first world.
Duplicating characters[]
A method is to go into the player file and copy the character. For example you have player3.plr and player1.plr, copy player3.plr into the players folder, then rename the copy to player2.plr. This will result in a clone of the player which has the same items as the player that was cloned. This is a very efficient way of farming anything.
Doors in lava[]
There is also a way to duplicate doors by placing a thin layer of lava on the ground that does not hurt you and placing a door in a doorway. Once you have placed the door, right click it continuously, do this and you will have stacks of doors, if you acquire them. This means that you will get infinite doors for any use.
When you let lava flood a chest, small layer, (I did it just on gold chest) and try to destroy it, top left part of it will disappear. Than you can mine it infinite times Here is image
In PC 1.2, if you try to place a Clay Pot on a reshaped block (e.g. a lowered block or a slope), the pot will clone infinitely, quickly filling up your inventory. It works on any solid block and doesn't work on Wood Platforms. This is quite an easy way of farming money in the early game, as every stack of 99 pots is worth 19 80 , and you get a full stack in around 5 seconds.
Getting 2 Cooked Marshmallows with one Marshmallow on a Stick[]
In version PC 1.2, cooking a marshmallow by holding it on the cursor rather than from the hotbar will result in gaining 2 cooked marshmallows; one in your inventory, and one in your cursor. If somehow your inventory gets full while doing this, however, you will get only one of the item.
Bar Duplication[]
This Bug only works on Multiplayer. It has been tested and does not work on singleplayer.
In version 1.2.0.3.1, If you stack Bars (All types) about 10 high, with several stacks right next to each other, and you destroy the bottom bars with a very fast pickaxe (like a Drax) the bars can duplicate. Sometimes this may not work, and rarely, you can lose some bars.
Item Transmutation[]
If you put any item in the Piggy Bank, then save and exit your world, when you reload it, the Piggy Bank's contents will be an amount of Iron Pickaxes that corresponds to the Data ID of the original item. This means that if you deplete an amount of Iron Pickaxes, so that the amount of pickaxes in the Piggy Bank is equal to the Data ID of another, desired, item, you can repeat the saving routine and take your new item. E.g, if I had the Terrarium(crafted with just 16 Glass) and I place it into the Piggy Bank and repeated the save routine, I would have 2208 Iron Pickaxes. If I then deplete 277 of them and repeat the save routine, I will have the Blizzard Staff. This is undoubtedly a very powerful glitch. (Reported to have been patched in the recent versions of the game)
Unsaved Worlds[]
There is another way of duplicating any item you have. Place this item in a chest and save and exit the world. Rejoin the world, take the item from the chest, and kill yourself (Most easily obtainable by falling from a high place without wings on). Before you respawn, press Alt+F4 to close the game (any other method of force-closing the game works). It is important to do this before respawning and DO NOT save the world. Upon rejoining the world, the item you put in the chest will still be there, but another one will be in your inventory. Obviously, this does not work for hardcore or mediumcore characters.
Build Mode[]
A very fast way to duplicate any item with a use animation on Switch 1.0.7 is to exploit the build mode feature (build mode is activated by pressing down the right stick while hovering over an item in your inventory while autopause is off). I have not tested this on other console versions, so I am unsure if this is exclusive to Switch or not. Put an item in your first hotbar slot (this item will be deleted when the glitch is performed), then an item you want to duplicate in any other hotbar slot besides 1. This must be an item that has a use animation, such as weapons, blocks, bars, or even fallen stars. potions and other consumable items may be duplicated only if there is more than 1 in your inventory. Hold the item you want to duplicate, then click the use button, go into your inventory, and then build mode very quickly (if using default controls, this would be ZR, X, RS all in quick succession). In order for the glitch to work correctly, you must enter build mode while the use animation is occurring. If done correctly, a duplication of the item will now have replaced the item in your first hotbar slot.
Item Duplication Glitch[]
First, you are going to need a chest and the items you want to duplicate. Place down the chest and then put the items you want to duplicate inside of it, then, open Settings and click on Save & Quit, then, get back into the world and take out the items in the chest. The second you get the items into your inventory, but in the middle of the saving screen, completely close the Terraria application. Then, when you get back into the world, you should have the items in your inventory, and still have them in the chest as well, allowing you to easily duplicate any item.
Exploits[]
Door/Bast Statue Glitch[]
In Terraria, the player must go underground. While underground, the player must have a lot of wood, a work bench, a furnace, and, of course, a wooden door. After setting it up, you should mine some blocks and craft a lot of items, then, place a Bast Statue and have sand falling on it and break the statue before the sand falls on it and destroy some wood and place more sand and destroy the platform the statue was on. This manipulates the code of the wooden door. After, then, you should jump up, which alters the code of the blocks, then, place a campfire on the altered blocks, then, the campfire will get destroyed shortly after with the smoke still coming from it. Destroy the campfire, and place the wooden door. After placing it, open it and then place another door, destroy and continue to jump up while glitching the door to be placed on and on and then glitching the blocks underneath and it and doing it a hundred more times and destroying and re-placing the door and tricking it to be placed and is destroyed again. If done correctly, the open door will be replaced by an obsidian door and then a roulette of items that randomizes and cause the lights of the torches to flicker. After hundreds of items display, the player gets an unused item that, when the player interacts with it, will get all of the items shown on the roulette. This exploit is used for speedruns.
Fishing Glitch[]
To perform this glitch, you will need a Fishing Rod and any kind of bait. The first thing you need to do is turn Autopause on, then, throw a fishing hook and open your inventory, which will pause the game. Right-click on an item, and throw the item outside towards the water. Once you close your inventory, two new lines will launch from you. Keep doing this infinitely to throw as many lines as you want. Make sure you don't press left click as that will break all of the lines and there is no limit of how many fishing hooks you can have at the same time.
Unlimited Money Glitch[]
First, the player will need 2 Teleporters and 1 Vortex Monolith. The player must go to a Snow biome and place the 2 Teleporters on top of each other, and then place the Vortex Monolith on the top-right of it. Destroying both Teleporters with a Picksaw at the same time leaves the Vortex Monolith floating, allowing the player to collect infinite amounts of it by right clicking on it and sell it for unlimited money.
Fixed Bugs[]
These notable bugs have been fixed and no longer exist in the current version of Terraria.
General[]
After knocking down a large tree, pieces of wood get stuck underground and stay there until you dig them out.
Place a door under water and constantly open and close it. The water will slowly disappear up to the base of the door. This is probably caused by the water in the 3 blocks that the door occupies being destroyed when the door is closed. (Water can now occupy the same space as a closed door, showing the door behind the water.)
Dirt no longer mixes with sand when controlled with the Dirt Rod, Instead, the dirt breaks, and can be picked up.
In mediumcore, when you die, if an item is in the trash bin spot, it will stay with you when you die. This bug can be useful for a thing you don't want to lose.
If you kill yourself and, right before you die, take your money out of your inventory by left clicking it, half of your money will still drop where you died, but you will still have your original stack. Basically multiplying your money by 1.5. making it possible to get unlimited money.
Oceans may spawn where Dungeons should be, causing the entrance to the dungeon to only sometimes be visible/accessible.
When you place a music box on a table or workbench, it will duplicate itself and create many copies (you can sell these for easy platinum coins).
In the 3ds version, if you start to autoswing a spear, then switch to a melee weapon that shoots a projectile (like the beam sword), the projectile would shoot insanely fast, and the sprite of the spear would float offscreen.
Using a slime mount on a Target Dummy and repeatedly hitting a low ceiling(low enough that you can start to fade in and out) will make you invincible, making the game much easier.
Like a boss
When on a computer with low graphics capability and low cpu ghz capability, while on a multiplayer world, if you fall towards the underworld, world generation glitches and you will fall beneath the world and die.
NPCs:
NPCs may fail to spawn, even though there are valid houses in the world and conditions are met.
Monsters[]
Creating an artificial Jungle: even if the depth meter says you're below sea level, Hornets or Man Eaters will fail to spawn.
In the Underworld, Piranhas will spawn in lava causing them to die the instant they spawn.
If you have 9 buffs on and then getting the Shadow Dodge buff (titanium armor) the dungeon guardian can't hurt you (1.3)
Multiplayer[]
A problem in the Client-Server synchronization causing monsters to suddenly teleport to another location when they are dealt damage by the player. (If this still happens, it's because of a bad host.)
The game may crash when you break 4 Shadow Orbs in a row.
80 
, and you get a full stack in around 5 seconds.
