Id Map01

Id Map01, also known as IDMAP01.WAD, is a single deathmatch level for Doom II built by American McGee. It is the only known level created by an Id Software employee which was released like a third-party level, instead of being directly part of the games, being part of an advertising deal (such as Tim Willits' Kick Attack! level), or having been created and released as fanworks before they actually became Id Software employees. No IDMAP02 or later were ever created.

This level was incorporated in DWANGO1.WAD and was adapted to Heretic as E6M3.