Portal 2 is Valve's 2011 puzzle game, sequel to Portal, set in the Aperture Science facility run by GLaDOS and later Wheatley. Its automated announcer lines became popular soundboard clips because the calm warnings suit almost any disaster online. Players share this one alongside other gaming announcements like bomb has been planted, using it for countdown memes, speedruns and fail compilations. The joke has lasted because Portal 2 remains widely replayed and quoted, and its sterile lab announcements still sound instantly recognisable to gamers even out of context today.