thanks, but no.. it was a Doom 3 "conversion" FOR old Doom 2 :) It had a really nice atmosphere and a lot of D3 textures, sounds etc...
something like this - http://www.doomworld.com/vb/wads-mods/43203-project-doom-3-on-gzdoom/
but the version i played had already big progress of being final.
found it :) it's called Doom 2.5