Wolfenstein 3D

Level select:
Start the game with the -tedlevel <level number> command line parameter. The level number is a two digit number with the tens digit representing the episode minus one and the ones digit representing the level number minus one.

Difficulty select:
Start the game with the -baby, -easy, -normal, or -hard command line parameters.

Unlimited lives:
Start the game with level select and difficulty select command line parameters.

Full health, ammunition, keys and chain gun:
Press L + I + M during game play. Note: Your score will reset to zero after this cheat is enabled.

Note: Every time this code is used, ten minutes gets added to your level completion time. If you are one to get below par, do not use this code to get the keys you need; you are better off going through the level.
Salmos.

Unlimited ammunition, invincibility, all keys:
Press M + L + S during game play.

Commander Keen cheat message:
Press A + B + T during game play.

Music test:
Hold M at the memory screen that appears while the game loads. Three music menu options will appear after the game finishes loading.

Cheat mode:
Start the game with the -goobers command line parameter. Press [Left Shift] + [Alt] + [Backspace] to enable debug mode. Enter one of the following codes to enable the corresponding cheat function.

Effect	Code
Change border color	[Tab] + B
Display number of items, doors, and actors	[Tab] + C
Skip two levels	[Tab] + E
Displays coordinates	[Tab] + F
Toggle God mode	[Tab] + G
Lose health	[Tab] + H
Free items	[Tab] + I
Display memory usage	[Tab] + M
Pause without message	[Tab] + P
Exit game	[Tab] + Q
Toggle slow motion	[Tab] + S
View graphics and play sounds	[Tab] + T
Add extra VBLs	[Tab] + V
Level select	[Tab] + W
Extra stuff	[Tab] + X

Key:
H: Dog
P: Pot
S: Soldier
V: Meat
K: Chicken
T: Treasure
A: Ammo
W: Weapon
M: Marine
G: Health
O: Secret room
L: Extra Life
*: Key