Doom
God mode:
Press Start to pause game play, then hold L + R and press A(2), B,
A(5).
Disable God mode:
Press Start to pause game play, then hold L + R and press A(2), B,
A, B(4).
Level skip:
In single player games, press Start to pause game play, then hold
L + R and press A, B, A(2), B(3), A.
Advance ten levels:
In single player games, press Start to pause game play, then hold
L + R and press A, B, A(2), B(2), A(2).
Computer map:
Press Start to pause game play, then hold L + R and press B, A(7).
Radiation suit:
Press Start to pause game play, then hold L + R and press B(2),
A(6).
Invincibility:
Press Start to pause game play, then hold L + R and press B(3),
A(5).
Berserk:
Press Start to pause game play, then hold L + R and press B, A,
B, A(5).
All weapons, items, keys:
Press Start to pause game play, then hold L + R and press A, B(2),
A(5).
