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For more information on this article, visit the IWAD page on the Doom Wiki.

An IWAD - short for Internal WAD - is the main resource file for a Doom-engine game, containing all the game's original sounds, levels, and graphics.


3DGE needs an IWAD file in order to play; without one the 3DGE engine has no game data to use.

3DGE needs an IWAD from either DOOM 1, DOOM II, FINAL DOOM, HACX, CHEX QUEST, or HERETIC to function. 3DGE also works with FreeDoom (Freedoom1.wad and Freedoom2.wad).

Alternatively, you can set your own IWAD with the -IWAD switch.


3DGE does not yet support the HEXEN IWAD, though it can read some graphics and level data from the game. It also does not support STRIFE.