Don't Deal With The Devil is the main theme of Cuphead, the hand-drawn run-and-gun game released in 2017 that draws its look and sound from 1930s cartoons. The vocal version leans into that era with big-band swing and theatrical singing, turning the game's central bargain into a memorable anthem. As players shared boss fights, speedruns and fan edits online, the theme became shorthand for the game itself. It remains popular because its catchy melody and old-time style instantly set a playful, high-stakes mood.