Call of Duty: World at War, released in 2008, used a multiplayer progression system where players earned experience and climbed ranks to unlock weapons and perks. The short jingle that played on each promotion became closely linked to that grind, and clips of it were later shared on soundboards and in gaming montages on YouTube. Its association with the World War II era shooter and early modern Call of Duty progression gives it a nostalgic pull for players who grew up with the game, keeping it popular as a shorthand for levelling up.