Plants vs Zombies is a tower defence game developed by PopCap Games and first released in 2009, in which players plant defences to stop waves of zombies reaching their house. The win music is the short tune heard after a level is successfully defended, and its upbeat, cartoonish style matches the game's humour. Years later, clips of the tune still circulate online because many players remember it from childhood, and creators reuse it as a nostalgic signal for success in gaming edits, reaction videos and memes.