Type in idfa to get all the weapons and ammo.
Type in idkfa for all the weapons, ammo, keys and an extra 200% armor.
Type in idbeholds to get the berserker pack.
Type in idclev(1-9) to change levels (depending on number)
Type in iddt(twice) to see where everyone is.
Type in idbeholda to see the whole map.
Type in idbeholdl to get the light amp goggles.
Type in iddqd to activate God Mode.
Type in idbeholdi for invisibility
Type in idbeholdr to get the radiation suit.
Type in iddt to reveal the game map.
Type in idclip to walk through walls.
For Doom 2: Hell on Earth.