Wolfenstein 3D 
PLATFORM: PC

1. To start the game type in WOLF3D -GOOBERS 

2. Once in the game, Hit ALT, L-SHIFT, + BACKSPACE At the same time. 

a. This enables your debugging. 

3. Use your tab key & a letter. Try'em all see what they do, here are some..... 

a. TAB G = God Mode ( You can not be killed )
b. TAB W = Select level ( Warp to any level you want )
c. TAB I = Free Idems ( Bullets & Big Gun )
d. TAB X = Extra Stuff
e. TAB S = Slow motion effect
f. TAB B = Change border color 

Tab and some of the other letter keys will produce some different results...Experiment and see ! 

4. If you do not choose to use the GOOBERS cheat, and are playing in the regular mode, you may use another type of built-in cheat... ( This will also work with the debugging enabled ) 

Just hit the keys MLI all at the same time, and you will be given 100% health, full ammo, the largest gun available, and all the keys ! But...for all this, your score will be taken to zero, thus knocking you out of a possible high score... You can continue to use the MLI trick as many times as you like.