E6M1 (Heretic)

E6M1 (aka Raven's Lair or Offices) is a hidden bonus level in Heretic, where it is E4M1 and the first of three bonus levels in the Heretic: Shadow of the Serpent Riders version of the game where it is E6M1.

This level and episode name are in fact Untitled and can only be accessed via a warp command. According to the Heretic FAQ, a map creator by the name of Sailor Scout came up with the name Fate's Path for the episode name and Offices for the map name. The wHeretic source port offers this "episode" on the main menu using the names Sailor Scout assigned. In an interview with Michael Raymond-Judy of Raven Software, he stated that this map was loosely based on the old Raven offices so Raven's Lair would be an appropriate name for it.

While this is not part of a true episode, completing this level in Shadow of the Serpent Riders, will take you to E6M2. In the original Heretic, completing the map will crash the game as it tries to find a non-existing E4M2.