Maniac Mansion is a point-and-click graphic adventure game by LucasArts in 1987. It was ported into the Nintendo Entertainment System by Jaleco in 1991.

This game is about the Edison family: Dr. Fred, a mad scientist, Nurse Edna, the wife of Fred, and their son Weird Ed.

NOTE: This hack has been superseded by Maniac Mansion Uncensored.

The Expurgation of Maniac Mansion for the Nintendo Entertainment System lists several changes that were made prior to the game's final release.

The prototype version of Maniac Mansion includes many things which were later removed but a few censored details are still missing. This hack restores those details and improves many of the graphics as well.

The following changes are included:

- Change the arcade game name to the name suggested
- Improve the look of the text scrawled in the shower
- Restore the pennant graphics in Weird Ed's room
- Restore several lines of censored text
- Improve the various portraits in the game
- Fix glitched room under the house
- Many other improved graphics

The visual changes in this hack were very tedious and time consuming due to the compression used for both the graphics and room layouts.

Database match: Maniac Mansion (USA) (Prototype)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: EA68E251BAD98CC492E5B88B27F19CFA0D981B3E
File CRC32: BBA3EF7E
ROM SHA-1: 2E18EBB1E0DAE649818A1D42B38F99FB3A0824E8
ROM CRC32: DE0C29A9