Player encounters trigger mechanisms they can or must interact with, usually in form of push buttons or turning levers/valves.
Alternate names: Buttons, Levers, Switches
The first video game about Interactive triggers was released in 1990.
Some of these have multiple states even, or allow very fine control over something, but most commonly these only have two states (on and off).
Parent groupInteraction: Environment
Child groupsPressure plates, Cross-map triggers, Disguised triggers
compare with these groups