The Corruption is an evil biome with a dark purple wasteland, death, and decay theme, with an evil forest design to it, in contrast to the red gore theme of its counterpart, The Crimson. Every world will contain one of the two, generated randomly (each with a 50% chance of occurring) or chosen by the player upon world creation. Both contain similar hazards and feature their own unique enemies, items, and blocks. The tools, weapons, and armor obtained via Corruption materials are generally faster, but slightly less powerful than those obtained via Crimson materials. Corruption enemies tend to have slightly lower stats, such as health, defense, and damage.
The Corruption surface contains purple Corrupt grass, Corrupt Trees, and Vile Mushrooms. Purple thorny bushes grow on the grass and will damage the player when touched. Water in the Corruption is also purple. The Corruption also contains multiple chasms, underground extensions of the biome. Chasms lead downwards in a straight line, some crossing a horizontal connector, ending with a Shadow Orb. Demon Altars generally line the chasm's passages, appearing inside and around it. Chasms consist of Ebonstone, which can be blown up by explosives, mined with a Nightmare/Deathbringer Pickaxe or higher, or purified to Stone by using Purification Powder, the Clentaminator, and the Terraformer .
The Corruption spreads, meaning it slowly converts adjacent tiles to their Corruption variants. See below for details. Chasms, Demon Altars, and Shadow Orbs will only appear upon world generation, and will not spawn in a Corruption area that has formed through spreading. For an area to be considered a Corruption biome, at least 300 / 200 tiles of Corrupt grass or Corruption blocks must be present.
The Corruption spreads itself, similar to the Crimson and The Hallow. This means that it slowly converts certain susceptible tiles that are in the vicinity of existing Corrupt blocks. While its spreading capabilities are very limited during pre-Hardmode, it spreads much faster and more aggressively after defeating the Wall of Flesh. Defeating Plantera for the first time reduces the speed of the Corruption's spread by 50%.
In Hardmode, Corruption spreads through Deserts, transforming them into Corrupted Deserts. A Corrupted Desert is fairly similar to a regular Corruption biome: The theme music and enemies are the same, with the addition of:
- Surface Desert:
- Underground Desert:
- During a Sandstorm:
Like the Corrupted Desert, Corrupt Snow biomes are created when Corruption spreads into a Snow biome during Hardmode. Snow Block is not convertible, but Ice Block can be converted into Purple Ice Block. Purple Ice can be created during generation if a Corruption biome overlaps a Snow biome, but it will not spread until Hardmode.
|The tree icon of a world with Corruption in world selection menu (right: Hardmode world)|
- During the generation process of a world with the Corruption, the left half of the progress bar frame will be purple, and the main progress bar will be lime green.
- Corruption can be created or spread artificially using Corrupt Seeds, Unholy Water, and either the Clentaminator or the Terraformer with Purple Solution, obtainable from the Steampunker during a Blood Moon in Corruption worlds (she sells Red Solution in a Crimson world instead).
- It is possible to create an artificial Crimson biome in a Corrupt world without the use of another world. To do so, one must buy Crimson Seeds in Hardmode from the Dryad while in a Graveyard.
- Artificially creating a new Corruption biome requires at least 300 / 200 Corruption tiles. Although Crimson might replace Corruption at world generation, it does not prevent Corruption from being artificially created in a Crimson world (and vice versa), nor does it prevent the Corruption biome's spread.
- During Hardmode, any enemy in the Corruption or Underground Corruption has a
0.04*1/2500 (0.04%) chance to drop a Corruption Key / Corruption Key Mold.
- The Steampunker will only sell the Decay Chamber and Purple Solution in a world that naturally generated with Corruption. Artificially creating a Corruption biome in a Crimson world will not cause her to sell these items.
- The Archaeologist's set can be hard to obtain in a world with Crimson. The Hat can be dropped by Doctor Bones, which can spawn in any world, but the Jacket and the Pants can only be crafted with Leather, which is crafted using Rotten Chunk, an item exclusive to the Corruption. However, this limitation can be overcomed using the Corrupt Statue which can spawn in both Crimson and Corruption worlds, and can be used to farm Rotten Chunks. Alternatively, the player can create an artificial Corruption biome with seeds purchased from the Dryad in Hardmode.
- A world with the seed 05162020 will have both Corruption and Crimson biomes.
- Early on, determining whether a world contains Corruption is possible in the following ways:
- The Guide will tell the player to break a Shadow Orb (Crimson Heart in Crimson worlds).
- During world generation, the left half of the progress bar frame is purple (red for Crimson worlds). Additionally, the main progress bar will be lime green (yellow for Crimson worlds). The step in the world generation process in which the Corruption is created is called "Making the world evil" ("Making the world bloody" for Crimson worlds). Also, the world's tree icon in the world selection has one purple-colored side (red for Crimson worlds).
- Due to the vertical, straight shape of the Corruption's chasms, fall damage is an omnipresent danger, should the player have not yet obtained anything that reduces or negates fall damage, such as Lucky Horseshoe (or its upgrades), Featherfall Potion, Umbrella (only works when held), or the Bunny or Bee Mount.
- Climbing out of a chasms requires certain gear as well: any hook, Climbing Claws/Shoe Spikes (or their upgrades), any Rope (though note that enemies can easily knock the player off), Slime Mount, or items enhancing the player's jump ability (see Jump Height Comparison).
- Hooks are viable for both negating fall damage and getting out of chasms.
- It is recommended to cover all chasms with platforms to reduce the likelihood of accidentally falling into one and suffering fall damage. Placing rows of platforms inside the vertical chasms can be helpful, too.
- In Hardmode, it may be worth buying Crimson Seeds from the Dryad in a Graveyard biome and create an artificial Crimson biome.
- Many Corruption enemies have rotten bodies, sometimes with green pus dripping out of them, as seen with the Eater of Souls and Corruptor. This contrasts with the Crimson enemies' abnormal cancerous-like growths.
- The lengthy chasms of the Corruption might be interpreted as worm tunnels, evidenced by its worm-like boss. Similarly the chasms in the Crimson could be neurons (cells found in the brain), relating to its associated boss, the Brain of Cthulhu.
- The horror media franchise Dead Space features an organism also called the Corruption, which spreads and terraforms affected areas, serving as habitats for the franchise's signature zombie-like creatures, the Necromorphs. Terraria's Corruption may have been based on this.
- The game Anti-Idle features an area called the Corruption, based heavily on the Terraria biome.
- The Corruption and its Shadow Orbs seem to be loosely based on "The Colour Out of Space", a science fiction/horror short story by American author H. P. Lovecraft, written in March 1927. In the story, a meteorite crashed near a small fictional town. The meteorite twisted the land, drove people insane, drained the life forces of anything around it, and deformed animals into grotesque abominations.
- This may have something to do with why meteorites begin falling after a Shadow Orb is smashed.
- During a Blood Moon, three critters turn Corrupt (the Corrupt Bunny, Corrupt Goldfish and Corrupt Penguin), a reference to the Corruption. They can also manually be turned Corrupt with Vile Powder.
- The progress bar color during world generation being green for Corrupt worlds might be based on the fact that the Corruption biome features the Cursed Flame as its exclusive material.
- Eaters of Souls can sometimes appear as ambient entities in the background in the surface Corruption biome.
- – According to the official game lore, the Corruption is a cancer caused by the sins of those living in the worlds of Terraria, and is strengthened by the vile actions and thoughts present in all living beings. Its purpose is to restore balance to life and then destroy it, leaving the world a lifeless abyss.
This content is transcluded from Biome backgrounds § The Corruption.
Jagged mountains with a single ebonwood tree and chasm
- Desktop 1.4.4: Corruption no longer destroys the Jungle and mud, instead turning Jungle grass to Corrupt Jungle grass.
- Desktop 1.4.1: Worldgen will attempt to avoid overlapping the Corruption with the Jungle during initial Worldgen.
- Desktop 22.214.171.124:
- The Corrupt tile requirement for generating the Corruption biome increased from 200 tiles to 300 tiles.
- Added three new backgrounds.
- Added alternative Corruption track, originally composed for the canceled Terraria: Otherworld.
- Desktop 126.96.36.199: Enemies now have the chance to drop Corruption Key instead of Corruption Key Mold. Ebonwood Trees now drop Acorns.
- Desktop 188.8.131.52:
- Desktop 1.2:
- Desktop 1.1:
- Corruption spreads through Sand and Stone, and will slowly turn Mud to Dirt after the Wall of Flesh is destroyed. This allows it to spread into the Cavern layer.
- An artificial Corruption biome now only requires 200 Ebonstone blocks instead of 500 blocks.
- Now has own specific background.
- Now has a underground theme.
- Desktop 1.0.6:
- Thorny bushes growing from the Corruption are now destroyed on contact with the player.
- The Corruption's music now has its own music (as opposed to before, when it used the track "Eerie" as its background music).
- Desktop 1.0.5:
- Desktop 1.0.4: Number of chasms generated in the world is decreased, but each chasm now has 100% chance to spawn a Shadow Orb.
- Desktop-Release: Introduced.
- Console-Release: Introduced.
- Switch 1.0.711.6: Introduced.
- Mobile-Release: Introduced.
- 3DS-Release: Introduced.