First of all, i'm a bit of a hl2-fanboy ;P
In Doom3 there is a map with alot of bricks in it, piled very high...
...tried to do the same with hl2 (and i made my first skybox \o/ )
But Hl2's physics can't handle that :(
The Bricks float in the air :(
If you look in Dr.Kleiners lab there is a photo of some doctors...
Gordon, Kleiner, Vance, Breen (With his head removed :p ) and someone who looks like G-MAN!
G-man is the leader of the resistance...
...and he is from the future
And thats probably makes him... GORDON-MAN! :o
The Map - (at least that part) - a HELL lot better
The Textures - A HELL lot better
The things that brings dod:s down (ON THIS SCREENSHOT) is the Weapon model (which is the current dod M1 Garand.)
(and the lack of quality in this pic (blurry etc.)