Final Doom Cheats (PlayStation)

Pause the game and press: Triangle, Triangle, L2, R2, L2, R2, R1, Circle. Now all
objects(including enemies), items, weapons, and secret switches will appear on the map.

Pause the game and press: X, Triangle, L1, Up, Down, Left, Left(twice). Now all weapons,
ammunition for them, and keys for the current level will be available.

10 - !6PQGGJVOZ  11 - WHHTNNPS65  12 - O1JQYV3N3  13 - 5MMD72GFZ1  14 - HK25JRDQNL  15 -
S772MKWKCF  16 - 78RB35L1VX  17 - J226DG5PNL

Pause the game and press: L1, R2, L2, R1, Right, Triangle, X, Right. Now your character
may see through one layer of wall or sprites.

Pause the game and press: Triangle, Triangle, L2, R2, L2, R2, R1, Square. Now all walls
and boundaries will appear on the map for the current stage.

Pause the game and press: Right, Left, R2, R1, Triangle, L1, Circle, X.

Mission - Password  2 - 610QNNFT35  3 - F!R251P1FD  4 - RBB4M6HRST  5 - QWC5CS83QS  6 -
NJJ64RFRPM  7 - N1J74MYSPR  8 - 811TMQ8W64  9 - 7KKNL7D443  10 - 28RFDDS5YX  11 -
C66YZLSGGG  12 - GR85XJVNBD  13 - C33V2DHGHK

2 - 7GGLPXL746  3 - YGZLPX2!56  4 - XHHSNYB965  5 - 75NK!VGZZO  6 - C2253RNRML  7 -
NT!3JRNDCB  8 - 8LLT8KRV02

Invincable= down, L2, Square, R1, Right, L1, left, Circle.
  All Weapons= x, triangle, l1, Up, Down, R2,<,<.