The Addams Family: Mansion Mayhem is a 3D platformer where players control Wednesday, Pugsley, Gomez, and Morticia to explore the Addams mansion, solve puzzles using each character's unique abilities, and collect relics. It supports up to four players locally or online, featuring cooperative and competitive minigames. The game emphasizes family-friendly humor and cartoonish horror themes, aiming at younger audiences while offering multiplayer fun.