A-200 is a jumpscare from Rooms: Fixed Expanded, a Roblox horror game built around exploring rooms and surviving sudden encounters. Players share the scare in gameplay clips and compilations, where the abrupt audio cue has become a shorthand for an unexpected appearance. Because the sound is short and instantly recognisable to Roblox horror fans, it is reused in reaction videos, short edits and meme compilations long after the original playthrough, keeping it useful as a quick way to signal danger or a failed run.