Fortnite, Epic Games' free-to-play battle royale launched in 2017, made loot chests a central part of every match, with players searching houses and landmarks for weapons and items. The chest opening chime became instantly recognisable to millions of players, and clips of it spread through gaming videos, streams and short-form edits as shorthand for a lucky find. It is still used today because Fortnite remains hugely popular, and the sound immediately signals reward, discovery and the start of a good run to anyone who has played the game.