The following are known Action Replay Codes for DOOM on Sony Playstation (PS1).

The codes should work with the region specified but may work for other regions as well.

Device Compatibility: Action Replay, CodeBreaker & GameShark

Version 1.0 Codes

Have BFG
800a865c0001

Have Blue Key
800a86180001

Have Chaingun
800a86500001

Have Chainsaw
800a86600001

Have Double-Barrel Shotgun
800a864c0001

Have Map
800a860c0001

Have Plasma Rifle
800a86580001

Have Red Key
800a86140001

Have Rocket Launcher
800a86540001

Have Shotgun
800a86480001

Have Yellow Key
800a861c0001

Invincible
800a85fc0001
800a85f40001
800a85f00064

Mega Rapid Fire
800a86c00001

Unlimited Bullets
800a86640064

Unlimited Plasma
800a866c0064

Unlimited Rockets
800a86700064

Unlimited Shotgun Shells
800a86680064

Have All Guns
500007040000
800a86480001

Infinite Ammo
500004040000
800a86640064

Version 1.1 Codes

Have BFG
800a887c0001

Have Blue Key
800a88380001

Have Chaingun
800a88700001

Have Chainsaw
800a88800001

Have Double-Barrel Shotgun
800a886c0001

Have Map
800a882c0001

Have Plasma Rifle
800a88780001

Have Red Key
800a88340001

Have Rocket Launcher
800a88740001

Have Shotgun
800a88680001

Have Yellow Key
800a883c0001

Invincible
800a881c0001
800a88140001
800a88100064

Mega Rapid Fire
800a88e00001

Unlimited Bullets
800a88840064

Unlimited Plasma
800a888c0064

Unlimited Rockets
800a88900064

Unlimited Shotgun Shells
800a88880064

Have All Guns
500007040000
800a88680001

Infinite Ammo
500004040000
800a88840064