Doom - PS

Pause the game. Enter these codes. Blow things away!

Secret Code	Effect
Down, L2, S, R1, Right, L1, Left, O	Invincibility
X, T, L1, Up, Down, R2, Left, Left	Load up!
Right, Left, R2, R1, T, L1, O, X	Level Warp
Secret Code	Secret Level
JCGDNFL888	55 - Fortress of Mystery
3P67ZNBQJG	56 - Military Base
JCGDNFL555	57 - The Marshes
BXXBXXB778	58 - The Mansion
JCGDNFL556	59 - Club Doom

Thanks to Revolution reader Hefe Weizen!