Blob Mode is a game mode in which the crew of Space Station 13 must remove a rapidly spreading, extremely destructive green Blob from the station. The station's AI must prevent anyone from leaving in this mode, and must also help the crew fight the blob off. Should the crew fail to destroy the blob after either a certain amount of time has elapsed or the blob has spread too far, the station will self-destruct, causing both the crew and the AI to lose the game.