Doom

Codes

All weapons, all keys, full ammo, armour and health
Press PAUSE while in a game. Now press and hold the # (hash) button and press PAUSE again. Release the ~ key and you'll have all the weapons, all keys and your ammo, health and armour will be totally full.
Contributed By: falsehead.
Invincibility Mode
While in the game press PAUSE then hold down the asterix key (*) and press PAUSE again. Release the asterix key and your characters face will now have yellow eyes, indicating he is totally invulnerable.
Contributed By: falsehead.
Level select
Type during gameplay.
Code Effect
1 + pause Level 1
2 + pause Level 2
3 + pause Level 3
Contributed By: nado.
Level Skip
Pause game,
Hold 0-9 to select level, no level 0
While holding, press pause again to warp to that level
A&B toggle 1X or 2X for access to levels 10-23
There is no level past 23, it will screw up the game
Contributed By: Tygran.

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