Fallout: New Vegas, released in 2010, is a post-apocalyptic role-playing game set around the casinos of the Mojave Wasteland, where players can gamble on slot machines and table games. The jackpot chime comes from that casino gameplay, signalling a payout rather than dialogue or combat. As gameplay clips and short-form edits spread online, the brief sound became a handy shorthand for luck and instant reward, easy to drop over unrelated wins, finds, and jokes. Its tiny length keeps it useful for fast-paced videos.