Source port cheat codes

To activate a cheat in most versions, one simply types the code while playing (this also applies while in automap mode). After the last letter has been entered, a message of acknowledgement will appear at the top of the screen. The status bar, face, and ingame view may also change, depending on the effects of the code. All of the codes for the original game work in all ports, unless otherwise noted.

Cheat codes in vanilla Doom are disabled on the "Nightmare!" skill level, except for the iddt and idclev cheats. However, many source ports enable cheats for all skill levels.

In some ports and in the original executables, cheat codes may be different on non-QWERTY keyboards. For example, in France, idkfa may be idkfq, because of the AZERTY keyboard layout commonly used there.

In some source ports, radiation suit effects obtained using idbeholdr protect the player from all radiation damage, even on surfaces which inflict 20% damage per second. Also, in some source ports, when a temporary powerup (e.g. invulnerability) is gained using idbehold, it is permanent until toggled off again (or the level ends).

In certain source ports, the idfa and idkfa cheats also include a backpack if the player does not have one already.

Some source ports enable both no-clipping cheats (idspispopd and idclip</tt>) to function while playing either game.

Doom Legacy
Most of Doom Legacy's additional cheat codes are executed via typing them into the console. All the cheat codes below are used this way, excluding the first.

EDGE
In addition to new cheat codes of its own, EDGE also allows the user to edit the cheat inputs to their own leisure through the language.ldf file. The codes below are the default forms of the new cheats.

Eternity
As well as supporting the additional Boom and MBF cheats, Eternity adds a number of its own.

ZDoom
In order to use cheat codes in "Nightmare!" skill or multiplayer in ZDoom, the variable "sv_cheats" must be set to "1" (true). This variable can be set by launching ZDoom, accessing the console via the tilde ( ~ ) key, and typing "sv_cheats 1". One should then be able to use any ZDoom-specific cheat by typing it into the console.


 * 1) In the ZDoom source code, see the function cht_DoCheat in m_cheat.cpp.