Portal was released by Valve in 2007 as a first person puzzle game set in the Aperture Science test chambers. Its sentry turrets became iconic not for sounding threatening, but for speaking in polite, high pitched synthetic voices while tracking the player. Lines like this one were shared in gameplay clips, remixes and gaming forums as players replayed the game and its 2011 sequel. The phrase stayed popular because it works outside the game too, as a caption for searching, waiting or finding nobody around.