Doom 64 Cheats

Press Start to pause the game, select Options to bring up the Options menu, select Password, and enter one of these passwords.
Each password enables the Features menu (cheat-options menu), and gives the player 200% health, 200% armor, a backpack,
maximum weapons and ammo, and all 3 Demon Artifacts.

On the Title Screen, click on the Options and from the Options, choose Password and then enter these codes:

At the password prompt, enter this password. Then, return to the title screen and wait for the game's introduction screen to show (just wait for about 30 seconds, and the screen will change). Now wait for the 3 demos. After the 3rd demo, there will be a 4th demo, showing how to beat Level 32: Hectic.

Enter these at the password screen to skip to that level.

Go to the Password screen and enter the following:

Go to the Password screen and enter the following codes:

On any skill level, beat Level 32: Hectic using the exit where you need each key. Then, for the rest of the game, there will be a Features menu when you press Pause (it will disappear if you shut off your Nintendo 64 or you exit the game).

You can exploit the N64 controller's "Neutral position reset"; feature easily in this game. What you do is hold down on the control stick, then simultaneously press L+R+Start. What this does is set the "down" position on the joystick to neutral. So what happens when you press up? You go REALLY FAST! Problem with this is that the neutral position is now "Down." To fix it, just let the joystick go neutral, then press the button combination again. This works GREAT in the first hidden level, "Outpost Omega" when trying to do the switch puzzle to get the artifact.

To unlock Hectic, you need to go to the first level, and shoot EVERY explosive barrel in the level, EXCEPT for the first one you see when on the staging platform. After you shoot the other 9 barrels, use the teleporter (Hidden in one of the walls in the main corridor) to return to the start of the level. Then, shoot the barrel you left and turn directly behind you, and go into the room with the berzerk pack. There will be an open teleporter- a blood stain marks the entrance. Be sure to hurry- it doesn't stay open long!Once you get here, good luck- some consider this one of the hardest Doom levels ever made! Once you beat this level, you unlock the Features menu.