Play Maniac Mansion emulator game online in the highest quality available. Maniac Mansion is a Nintendo game that you can enjoy on Play Emulator. This NES game is the US English version that works in all modern web browsers without downloading. Maniac Mansion is part of the Arcade Games and Adventure Games you can play here. PlayEmulator has many online retro games available including related games like Motocross Maniacs 2, Battlemaniacs, and Dragon Quest Characters: Toruneko No Daibouken 3 Advance - Fushigi No Dungeon.