some of these cheat codes work for Doom 1 shareware as well!
iddqd - God mode (can't be harmed by anything!). Well, this isn't entirely true. There are several instances in which it doesn't help. The first is if you are on a teleport and something ports to where you are: you die. The second is where you are in an area that is
specifically set to overide God mode; an example is the last room in
E1M8. A 3rd is a monster spawn spot. However, for 99.9% of the time, it effectively makes you invulnerable. If your health is less than
100%, then it is boosted to 100%. This cheat is toggle type.
idkfa - You get max ammo, max armour and max weapons. This cheat is more effective if you've found a backpack (if you have a backpack, then using the cheat gets you twice as much ammo as without a backpack).
idfa - As idkfa, but no colour keys.
idbehold - (followed by pressing one of S, V, I, R, A or L) Toggles the selected 'Power-Up'. The Power-Ups are:
Power-Up Type Duration for which the effect lasts
S - Berserk Strength The rest of the current level (***)
V - Invulnerability 30 seconds
I - Invisibility, 60 seconds
R - Radiation Suit, 60 seconds
A - Allmap (computer map) The rest of the current level
L - Light Amplifiers. 120 second
(***) The screen goes red for 30 seconds.
idmypos - prints coordinates in hex
idclev - followed by map number inwill warp you to that episode and level.
idmypos - display co-ords and angle of view in hex notation.
idchoppers - this code gives you the chainsaw. Press '1' to use it.
idmus - followed by 2 digits making a number from 01 to 32. Switch music to that from a different level.
idclip - Walk through walls (zero clipping, they call it). This cheat is toggle type. You can't activate teleporters, pick up things, etc., when this mode is on. Plus, it can be difficult to fight the bad guys because their gun blasts, etc. can knock you through a wall!). See below for equivalent Doom II code.
While in MAP mode (ie. after having pressed the TAB key)
