Full Guns and Ammo:
Pause the game and press X, Triangle, L1, Up, Down, R2, Left, Left.
Full Map:
Pause the game and press Triangle, Triangle, L2, R2, L2, R2, R1, Square.
Invincibility:
Pause the game and press Down, L2, Square, R1, Right, L1, Left, Circle.
Level Warp:
Pause the game and press Right, Left, R2, R1, Triangle, L1, Circle, X.
Map with Objects:
Pause the game and press Triangle, Triangle, L2, R2, L2, R2, R1, Circle.
X-Ray Specs:
Pause the game and press L1, R2, L2, R1, Right, Triangle, X, Right.
Unknown Levels:
In the password screen enter DOOMMNL, then fill in the last three spaces with
the letters or numbers of your choice. It has only worked for me with
strait sets like !!! or 666. You will be sent to an unpredicted level with an
unusual amount of ammo, armor, and life (ex. 1000 cells) according to the three
digit code.
Doom in link mode:
Connect two playstations with the linkcable and turn the power on. Now startup
DOOM on your PSX. Select Deathmatch or cooperative... Now your PSX should try to
connect to your mates PSX... Wait sum seconds and remove the cd from the 1st PSX
and startup DOOM with it on the other PSX... Do all the selections like on the
other PSX..., BINGO! ready to play... Each time the game seems to hang simply
swap the disc... But always wait sum seconds before removing the cd... I know,
it's anoying to swap discs each time, but it's cheaper than to buy a second one!
