InvincibilityWhile playing the game, hold L and press X, Y, B, A. If you entered the code correctly, you will hear a sound. To confirm that it is enabled, fire any weapon with splash damage at a nearby wall. Note: When a new area is loaded, the code must be re-enabled to regain its effect.
Level skip in Doom 2 and Ultimate Doom
While playing the game, hold L and press A(2), B(2). If you entered the code correctly, you will hear a sound.
Toggle God and Degreelessness mode in Doom 2 and Ultimate Doom
While playing the game, hold L and press A(4). If you entered the code correctly, you will hear a sound.
All weapons, health, keys, and armor in Doom 2 and Ultimate Doom
While playing the game, hold L and press B(4). If you entered the code correctly, you will hear a sound.
Temporary invincibility in Doom 2 and Ultimate Doom
While playing the game, hold L and press X(4). If you entered the code correctly, you will hear a sound.
Toggle invisibility in Doom 2 and Ultimate Doom
While playing the game, hold L and press X(2), Y(2). If you entered the code correctly, you will hear a sound.
Toggle Berserk mode in Doom 2 and Ultimate Doom
While playing the game, hold L and press X(3), Y. If you entered the code correctly, you will hear a sound.
Full map in Doom 2 and Ultimate Doom
While playing the game, hold L and press Y(4). If you entered the code correctly, you will hear a sound.
Chainsaw in Doom 2 and Ultimate Doom
While playing the game, hold L and press B(2), A(2). If you entered the code correctly, you will hear a sound.
Radiation suit in Doom 2 and Ultimate Doom
While playing the game, hold L and press X, Y(3). If you entered the code correctly, you will hear a sound.
Light amplification goggles in Doom 2 and Ultimate Doom
While playing the game, hold L and press Y(3), X. If you entered the code correctly, you will hear a sound.
Secret web site and code
On the Phobos Labs Sector 2 level, located in the Commons area, play all five levels of the Martian Buddy Blaster mini-game. Upon winning, you will receive a message in your personal PDA giving you this link: http://www.martianbuddy.com/blaster.html. This is one of two ways to get the code (634) for lockers #116 and #117 in the Delta Labs. The second method is to get the Patrick Hook PDA.
