The Lucasfilm Games Maniac Mansion game is a vintage 3.5" floppy disc for various computer systems such as the Commodore 64, Amiga, and IBM PC. With a minimum requirement of 384K RAM, this game allows players to immerse themselves in a quirky and humorous haunted house adventure. The game is compatible with operating systems such as Atari ST, Tandy, and Commodore 64, offering a nostalgic gaming experience for retro computer enthusiasts. Complete "Big Box". Never opened.