Crime City Nightmare is a series of alternate future/universe skins in League of Legends. Set in Valoran City, champions are mobsters who vie for control of the city until things take a dark turn when a mysterious figure introduces those desperate for power to an ancient evil.

Crime City Nightmare officially encompasses three skin lines: Crime City, Crime City Nightmare, and Debonair.

Eldritch horrors lurk within the crime and grime of Valoran City. Black markets have given rise to Elixirs: a valuable substance of dubious origin whose production spells money and influence should any gang corner the market. Spurred on by agents of corruption, capos and cronies alike look to forces beyond the veil for a taste of true power.