The Crimson

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BiomeBannerCrimson.png
Thorny bushes in the Crimson
Thorny bushes growing in the grass.
For the underground Hardmode variant of this biome, see Underground Crimson.
"Making the world bloody"

The Crimson is an evil biome with a fleshy infection, red gore theme, in contrast to the dark purple wasteland theme of its counterpart, the Corruption. Every world will contain one of the two generated randomly except for special seeds (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 Crimson material generally have minor advantages over those obtained via Corruption materials; however, Corruption tools are slightly faster. Crimson enemies tend to have slightly higher stats, such as health, defense, and damage.

The Crimson surface contains red Crimson grass, Crimson Trees, and Vicious Mushrooms. Red thorny bushes grow on the grass and will damage the player when touched. Water in the Crimson is also red. The Crimson also contains multiple chasms, extensions of the biome into the underground. Every chasm has an entrance on the surface and leads to a large, circular cavity, then branches off into small "fingers" which end with a Crimson Heart. Crimson Altars generally line the chasm's passages, appearing inside and around it. Chasms consist of Crimstone, which can be blown up by explosives, mined with a Nightmare/Deathbringer Pickaxe or higher, or purified to Stone by using Purification Powder.

The Crimson spreads, meaning it slowly converts adjacent tiles to their Crimson variants. See below for details. Chasms, Crimson Altars, and Crimson Hearts will only appear upon world generation, and will not spawn in a Crimson area that has formed through spreading. If enough Crimson manages to take over a new area, then that area will eventually adopt the Crimson's theme music, background, and water color. For an area to be considered a Crimson biome, at least  300 / 200 tiles of Crimson grass or Crimson blocks must be present.

Contents

See Underground Crimson for the content found during Hardmode in and under the Cavern layer.
Characters
Unique Treasures
Unique Drops
From Crimera:
From any enemy in Hardmode:
From Blood/Dark Mummies:
From vegetation:
For Sale
Music

Spread

Main article: Biome spread

The Crimson spreads itself, similar to the Corruption and the Hallow. This means that it slowly converts certain susceptible tiles that are in the vicinity of existing Crimson 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 Crimson's spread by 50*1/2 (50%).

Crimson Desert

A Crimson Desert.

In Hardmode, Crimson spreads through Deserts, transforming them into Crimson Deserts. A Crimson Desert is fairly similar to a regular Crimson biome: The theme music and enemies are the same, with the addition of:

Sand is replaced by Crimsand. Cacti drop ordinary cactus when cut, even though they have a different color. Waterleaf is not able to grow in Crimson Deserts. If a Crimson biome overlaps a Desert biome during world generation, Sand will be converted to Crimsand, but it will not spread until Hardmode.

Crimson Snow

Like the Crimson desert, Crimson Snow biomes are created when Crimson spreads into a Snow biome during Hardmode. Snow Block is not convertible, but Ice Block can be converted into Red Ice Block. Red Ice can be created during generation if a Crimson biome overlaps a Snow biome, but it will not spread until Hardmode.

Notes

IconCrimson.png IconHallowCrimson.png
The tree icon of a world with Crimson in world selection menu (right: Hardmode world)
  • Crimson can be created or spread artificially using Crimson Seeds, Vicious Powder, Blood Water, and either the Clentaminator or the Terraformer with Red Solution, obtainable from the Steampunker during a Blood Moon in Crimson worlds (she sells Purple Solution in a Corruption world instead).
  • It is possible to create an artificial Corrupt biome in a Crimson world without the use of another world. To do so, one must buy Corrupt Seeds in Hardmode from the Dryad while in a Graveyard.
  • Artificially creating a new Crimson biome requires at least  300 / 200 Crimson tiles. Although Corruption might replace Crimson at world generation, it does not prevent Crimson from being artificially created in a Corruption world (and vice versa), nor does it prevent the Crimson biome's spread.
  • During Hardmode, any enemy in the Crimson or Underground Crimson has a 0.04*1/2500 (0.04%) chance to drop a Crimson Key / Crimson Key Mold.
  • The Steampunker will only sell the Flesh Cloning Vat and Red Solution in a world that naturally generated with Crimson. Artificially creating a Crimson biome in a Corruption world will not cause her to sell these items.
  • A world with the seed 05162020 will have both Corruption and Crimson biomes.
  • Trees in the Crimson do not drop Acorns.

Tips

For elaborate strategies on surviving in the Crimson, including detailed gear recommendations, see Guide:Surviving in the Crimson.
  • Early on, determining whether a world contains Crimson is possible in the following ways:
    • The Guide will tell the player to break a Crimson Heart (Shadow Orb in Corruption worlds).
    • During world generation, the left half of the progress bar frame is red (purple for Corruption worlds). Additionally, the main progress bar will be yellow (lime green for Corruption worlds). The step in the world generation process in which the Crimson is created is called "Making the world bloody" ("Making the world evil" for Corruption worlds). Also, the world's tree icon in the world selection has one red-colored side (purple for Corruption worlds).

Trivia

Two Crimson chasms overlapping each other.
Crimson logo with Blood Crawler displayed on the Official Terraria Forums and this wiki (Crimson style)
  • Occasionally, two chasms might overlap, causing a sort of "cross" or "X" pattern, as seen in the image to the right.
  • Because of the large circular cavity, its out-warding branches, and the entrance tunnel cutting at sharp angles, the chasm has many interpretations when combined with the Crimson's gore-related theme:
    • A cartoonish hand with its fingers outstretched.
    • A heart connected to veins, because of its red theme.
    • These chasms could represent the body of a neuron, a cell in the brain, evidenced by its associated boss, the Brain of Cthulhu, while the Corruption chasms resemble worm tunnels and has a worm-like boss, the Eater of Worlds.
    • The entrance of the chasm has teeth-like stalactites and stalagmites, and could be interpreted as the entrance being the mouth of a beast.
  • Many Crimson enemies have deformed features or blisters that resemble cancerous growths. This contrasts with the rotten bodies of many Corruption enemies, sometimes with green pus dripping out of them.
  • During a Blood Moon, three critters turn Vicious (Vicious Bunny, Vicious Goldfish, and Vicious Penguin), a reference to the Crimson. They can also manually be turned Vicious with Vicious Powder.
  • Official Terraria Lore – According to the official game lore, the Crimson is a living being who wants to balance the world, and the creatures who come from it used to worship the Crimson. It acts like a hive mind connected to all worlds. The being itself is unseen.
    • Based on this, it appears likely that Crimstone is this massive being's flesh. This is supported by its appearance, as well as the fact that the item used to craft items with it is called the Meat Grinder.
  • The crimson could be a reference to the corruption bacteria from the Dead Space series.
  • The progress bar color during world generation being yellow for Crimson worlds might be based on the fact that the Crimson biome features the Ichor as its exclusive material.
  • Old-gen console version The achievement "Corruptible" refers to the Corruption. However, the Crimson appears to have no Crimson achievement equivalent.
  • Crimerae can sometimes appear as ambient entities in the background in the surface Crimson biome.
  • Crimson lore.png

  • Gallery

    This content is transcluded from Biome backgrounds § The Crimson.

    See also

    History

    • Desktop 1.4.0.1:
      • The Crimson tile requirement for generating the Crimson biome increased from 200 tiles to 300 tiles.
      • Added three new backgrounds.
      • Added Otherworldly Crimson track from the cancelled Terraria: Otherworld.
    • Desktop 1.2.3: Crimson Deserts now have the proper water color. Added unimplemented crimson monster sounds.