"What in Hell is Bad?" is a mobile game developed by Prettybusy. It is a simulation game where players touch, move, and leave traces. The games tagline is "God disappeared one day, and all the blame is on Hell". There is also a modified version of the game called "What in Hell is Bad? MOD" that offers additional features such as a menu option, god mode, damage multiplier, and defense multiplier. The game is available for download on various platforms such as Google Play, APKPure, TapTap, and ModAPKDown.