Loki is a boss in The Binding of Isaac, Edmund McMillen's roguelike dungeon crawler that first released in 2011 and was later rebuilt as The Binding of Isaac: Rebirth in 2014. Like many of the game's bosses, Loki became a fixture of Isaac streams and let's plays, where viewers learned its attack patterns by heart. Short clips of its sounds now circulate as quick references among fans, used to flag a boss encounter or riff on the game's punishing difficulty. The clip endures because the Isaac community still makes and watches runs every day.