Recognize the entrance
What the doorway looks like
Red-room tools create the doorway at a valid red outline on a wall.
Red doorway


Original game-art examples, shown facing upward where relevant. Door textures and appearance can vary with the floor or item effects.
Find the entrance
How to enter Red Room
Use Red Key, Cracked Key, Crystal Key, or Soul of Cain where a valid red door outline appears.
What you can find
Rewards and opportunities
Extra ordinary or special rooms, access to an Ultra Secret Room, and the tainted-character room at Home.
Unlock tainted characters at HomeBefore you commit
The risk to plan around
Extra rooms can contain combat. Trying to create a room beyond the map boundary can lead to I AM ERROR.
- A Red Room takes on the rewards and rules of its generated room type.
- Normal red-room exploration is unavailable in Greed mode.
Useful connections
Items that affect this room
Reference
Repentance rules and room variants
This guide describes the room type. Exact layouts and contents can vary. The rules use Repentance references; Repentance+ can change them.