Maniac Mansion (SW) ROM Download for Nintendo (NES) on Emulator Games. Play Maniac Mansion (SW) game that is available in the United States of America (USA) version only on this website. Maniac Mansion (SW) is a Nintendo emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Maniac Mansion, Shadowgate (SW) and Deja Vu (SW) as shown below. Maniac Mansion (SW) works on all your devices in high quality.