Castlevania II: Simon's Quest was released for the Nintendo Entertainment System in the late 1980s as a sequel to the original Castlevania, following Simon Belmont on a quest to lift a curse. Its game over theme plays after Simon loses all his health, closing a run with a slow, mournful melody rather than a dramatic fanfare. As retro gaming clips, speedruns and nostalgia edits spread online, the short jingle became an easy shorthand for failure. It remains popular because it is instantly recognisable to NES players and still reads clearly to viewers who never played the original.