Doom 3

Xbox

Invincibility:
Hold Left Trigger and press X, Y, B, A.

Skip Level:
Go into your PDA, go to objectives.
Hold Left Trigger, press B, A, X, Y
When you exit the PDA, it'll load the next level.



Security Cabinet Codes:

396	Cabinet 001
483	003
752	009
586	013
347	017
531	023
409	038
102	039
123	047
123	048
123	049
246	054
142	054 (second)
972	063
651	064
364	078
364	079
259	103
579	104
538	112
715	114
972	116
624	116 (second)
624	117
371	213
298	215
841	317
836	386
836	387
571	452
372	666
468	669
0508	Martian Buddies 1 and 2
734	Weapons Starage 1 and 2

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The following codes are for Ultimate DOOM and DOOM II included in the Collector's Edition.
Enter any of the following codes during gameplay and while Holding Left Trigger. Entering them in again will toggle their effectiveness ON / OFF:

Press (X) 4 Times	Temporary Invincibility
Press (Y) 4 Times	Show All Map ( Cannot be toggled OFF )
Press (X) 1 Time then Press (Y) 3 Times	Radiation Suit
Press (Y) 3 Times and (X) 1 Time	Light Amplification Goggles
Press (X) 2 Times then Press (Y) 2 Times	Invisibility
Press (A) 4 Times	God Mode
Press X, Y, B, A	God Mode (alt)
Press B, A, X, Y	Level Skip
Press A, B, A, B	Gives All Keys, weapons, ammo, and 200% armor
Press (B) 4 Times	Gives All Weapons and Ammo ( Cannot be toggled OFF )
Press (B) 2 Times then Press (A) 2 Times	Gives Chainsaw
Press (A) 2 Times then Press (B) 2 Times	End Level
Press (X) 3 Times then Press (Y) 1 Time	Berserk Mode

Thanks to Revolution readers Joe, Matthew Roderick, Glenn Matlock, Scotty, Charlie Izzarelli, and Ade Mangum!