Events occur once every 180 seconds, or three minutes. The game will select from a variety of different scenarios at random.
Wrong Portal[]
Specific Location: Portal Room
When this event occurs, Evoker and Grue will spawn in the Portal Room.
Zombie Apocalypse[]
Specific Location: Main Hall
When this event occurs, Soldier Zombie begin to spawn in swarms in the main hall.
Blackout[]
Specific Location: Everywhere
When this event occurs, the lights in the facility goes out, with the only source of illumination being from the players themselves.