The Into The Unknown WAD file, story text and info file. There's 9 levels, new sounds, music and graphics. It's placed over episode 2.
Into the Unknown is a cyber-mystic DOOM wad starring a girl attacked by vicious monsters, ending up saving the whole world from the onslaught of two evil organic computers. This wad has 9 new levels (a whole new episode), every level on the episode has new music, all sounds are new and also some graphics. There is also a story about it, cool idea to print it and read it as you play.
The ideas were drawn from mysticism and horror fiction, although delibateraly in a very superficial manner.