G:Doom

C:Start With MEGA Health And MEGA Armor!|BDEA-B053<br>62EA-B953|Galoob|
C:Start With More Ammo|E3EA-B153|Galoob|
C:Heat Vision/Color Blind Mode|CBD3-B17F|Galoob|
C:Select "The Shores of Hell" Or "Inferno" In Any Skill Level|D7CF-F953|Galoob|
C:Adds 1 Armor Point Everytime You Select "New Game" From The Main Menu|E3EA-B953|codemaster@pipeline.com|This code works for all 3 scenarios. The effects are cumulative, so if you select New Game once you start with 1 Armor point, twice and you get 2, etc.
C:Unlimited Health|10DD-2A7B|Peter Xiong|
C:Unlimited Ammo|10DE-B25B|Peter Xiong|
C:Unlimited Armor|10DD-2A8B|Peter Xiong|
         
T:Knee Deep In The Dead Codes

C:Start Off With 100 Bullets For The Pistol|FFEA-B953|codemaster@pipeline.com|On the the other scenarios, these codes reduces your ammo to 000.
C:Start Off With 100 Bullets For The Pistol #2|F5EA-B953|codemaster@pipeline.com|If you select "New Game", however, the hundreds digit gets a weird character in it and it appears that you have close to unlimited ammo. The ammo count goes down, but once you 100 bullets, you get another weird character and 99 more bullets. It looks like one of those codes that gave you more than the allowed number of lives.
C:You Start Off With The Normal Amount Of Pistol Ammo (50), But...|FxEA-B953|codemaster@pipeline.com|<p>...when you select New Game your amo is reset to 4 (and you thought that Nightmare! level was hard BEFORE)!</p> <p>X can be replaced with 0, 6, or 7.</p>
C:You Start With 1 Ammo|F4EA-B953|codemaster@pipeline.com|Choose New Game and you get the glitched ammo counter mentioned earlier. 
