Maniac Mansion Game Genie Codes (USA)
This page contains the Game Genie codes I have for Maniac Mansion (USA), a game for the original NES (Nintendo Entertainment System). If you're playing with an emulator you'll typically be able to put these codes into the program directly through a built in option. Any of you who are old school and playing on a physical console, you'll have to purchase a physical Game Genie cheat device to use these codes.
If you don't see the code you want on this page, I recommend you return to my Maniac Mansion Guides Index and choose a different section.
Anyone Can Write a Great Manuscript: ZAVPVGPA
They will say it's awful while writing it, but when you read it they'll say it's great
Fast Package Delivery: NNXEONOU
As soon as you reach the third floor, the short timer will activate
Faucet & Sink Gives Radioactive Water: ZAVUSIPA
Swimming Pool gives Clean Water: PASUEIZA
Edna takes you to her room instead of jail: LOOOIZGA
It's a short cut upstairs if you get caught in the Kitchen
Edna takes you to kitchen instead of jail: YEOOIZGA
No Sandy in ending: ZPNLPPPA
Purple Tentacle sends you to Fuse Box instead of Jail: AASASLGE
Weird Ed sends player to his room, instead of Jail: ZPXENIGE
Weird Ed sends player to Sandy's room, instead of Jail: TPXENIGE
You can easily beat the game if you grab the Card Key
All Codes Start Out As 0000: SEXGKASZ
This includes Edna's Phone Number, The Safe Combination, the Seckrit Lab and the Police Radio number. The Secret Keypad near the Steel Security Door has a randomly generated password every time it's used, it won't work with this code.
Fast First Cutscene: NNSOPEUX
As soon as you enter the house, the first cutscene will play (This will make the package come faster)
Weird Ed will answer doorbell (if he gets the package himself): NPUPIOGI
Weird Ed will not be your friend, if you give package but will answer doorbell: NOUEVVGI
Fast Publisher Mail Delivery
If it goes too fast for you, remove a line of code to slow it down.
NYSAXYON
NYSAVNEN
NYNAKYUV
NNEEEYUV
NNOAXNEN