Make sure you have Source SDK 2013 Singleplayer installed on Steam. And set to upcoming. Otherwise, you cannot play this mod.
Gamebanana.com it is just this
Could it become the definitive DOOM experience? Only time will tell...
"Rise and Shine Mr Blazkowicz Rise and... Shine". This is a Blast from the past. Breathing new life into an old classic. Doom 3D never looked so good! and while it is incomplete, it definitely has "limitless potential hmm" 10/10