Hectic - Map 32

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.

Skip to some levels in Skill level: Bring it on

Go to the Password screen and enter the following codes:

Super Duper Speed

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.