In Creatures 1 and Creatures 2, the engine choose a creature at random to infect with bacteria. Each bacteria starts off by infecting infect a norn or grendel with one antigen. Later, after the bacteria themselves have evolved, they randomly infect a norn or grendel with an unknown toxin, which may include more than one antigen, one or more histamines, and other toxins. Players that wish to avoid this evolution can export their norns and reset their world using the Emergency Kit.
In Creatures 3, bacteria are actual agents that float around the world. You cannot see the bacteria without aid. The Hoverdoc can provide this in the form of a bacteria-detection spray, or you can use VisiBug by Hausmouse. The HoverDoc and Containment Chamber can also provide bacteria-killing spray. In DS, you can use the Bacteria Button by Moe to see the bacteria. To remove bacteria using the CAOS Command Line, see C3/DS_CAOS_Codes#Getting_rid_of_things. The bacteria nerf patch changes several aspects of bacteria in the games.
In Creatures Village, the haunted forest and dungeon are the most bacteria-laden part of the world, and the house is bacteria-free.
- Norn Biochemistry 101: A peek inside a Norn
- A CAOS tutorial on how to reduce the total amount of bacteria in the ship for C3 and DS
|This stub could use .|