When the bots initially appear in the custom games, there will only be Survivor bots. Behaviour stated that Killer bots would be added in a later game so that players may train versus a Killer if they so choose. The Killer bots’ delay is due to the AI having to be “taught to utilise each Killer’s power first,” but the Survivors don’t have to worry about that because they rely only on perks rather than powers.
