The Adventures of Fatman is described as a retro-style adventure, made with the AGS engine. Therefore the controls are mouse driven, movement and actions are not in real-time, and puzzles are presented similarly to the Secret of Monkey Island and its ilk. An 'easy' mode is provided for beginners, which offers clues and allows resumption after death.
The game puts you as crime-fighter Fatman in the city of Shadowlawn, which is virtually crime-free...until one day there is an explosion at cosmetics company Acne Labs. Fatman must solve the case and figure out what is truly going on in Shadowlawn. The game plays out with humor inspired by Batman and similar comic characters.