Pony Island was released in 2016 by Daniel Mullins as a meta horror puzzle game disguised as a cheerful arcade game about ponies. Its story plays with a possessed arcade cabinet, corrupted code and a player trying to escape the machine itself. That mix of retro presentation and unease made it a cult favourite among indie horror fans. Short audio cues from its world later circulated on soundboards, where the title alone signals to players that something sweet-looking is about to turn sinister and broken.