Weclock: goddamn it's 3d Realms/Apogee, I'm convinced.
I'M not convinced yet. If it were 3D Realms & Apogee, it would really take away from the hugeness of this announcement. Much as I'd love to play the full version of Shadow Warrior after all these years, I think it's probably more than likely some developer that not only fits ALL the clues (and is not jammed into all the clues just to convince yourselves it's 3D Realms/Apogee), it would also bring a LARGE catalog of titles.
So I personally am convinced it's Atari/Infogrames/GT Interactive (since UT and its ilk are already on GOG, why not get that publisher, too?). Why? Because GT Interactive/Infogrames/Atari has an amazing back catalog of not only published titles, but developed ones too:
Blood (which was Monolith-developed, NOT 3D Realms (even though the Build enging was used)
Unreal Tournament (sound familiar?)
Oddworld: Abe's Exoddus (again, sound familiar?)
Oddworld: Abe's Oddysee (once again, sound familiar?)
the Area 51 arcade game port to PC
The Witcher (again, sound familiar?
So, I think it's GT Interactive/Infogrames/Atari, since a lot of their published games are already up on GOG.com.
BJ