Wolfenstein 3D

God mode:
Press 4, 6, 6, 8 during game play or while on the automap screen.

All items, all keys, full ammo:
Press 4, 9, 9, 6 during game play or while on the automap screen.

Level skip:
Press 4, 7, 8, 6 during game play or while on the automap screen.

Previous level:
Press 4, 6, 9, 6 during game play or while on the automap screen.

Refresh information:
Press 4, 8, 8, 7 during game play or while on the automap screen.

Music test:
Press # when the "ball" appears on the title screen.

Level select:
Hold 1 + 3 + 7 + 9 at the main menu. Note: Levels 3-5 and 6-7 are bonus levels.

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