Undertale is an indie role playing game released in 2015 by Toby Fox, known for letting players spare every monster instead of fighting them. Completing the game without killing anyone unlocks the pacifist ending, a longer and more emotional finale centred on friendship and freedom for the underground monsters. Clips from that ending, including this laugh, are shared by fans in playthrough highlights, remixes and reaction posts. Its continued use reflects how strongly the pacifist route resonated, becoming shorthand among players for earning the kindest possible outcome.