Not actively working on it at the moment, I may revisit the project at a later time but thought best to archive it for now until I revisit the project.
Update: 04/03/2016: Currently aware of Doom 1, 2's issues, will be looking into these eventually, sorry if I haven't updated as much but I'll get around to it eventually, just don't want to rush any new builds until I'm sure I can bring out more stable builds. I am also considering making changes based on feedback that I was given.
Mods currently been used by: The Aliens Mod, is compatible with Brutal Doom. (Older PC's may experience lag)
The Ultimate Doom 1 Beta 3 build has been tested, is now working on the Doomsday Engine.
Blog from Feb:
Currently I'm proud to say that the Ultimate Doom is now working as 1 single level. So you should in theory be able to explore the entire Ultimate Doom, be able to go anywhere, that includes all the secret levels (except the Xbox version's because I don't have those files)
Feel free to check the full preview here: