Payday 2 is a co-operative heist shooter released in 2013 by Overkill Software, and the Cloaker is one of its most feared special enemies, known for hiding in vents and ambushing players. His distinctive charging cue became a running joke and warning sign in the community, shared in clips, streams and edits long after release. Because experienced players react to the noise before they even see him, the sound now works outside the game as a meme for an ambush, a jumpscare or anyone appearing out of nowhere.