Runs fluently on my old rig. AMD Athlon II X2 250, nvidia 8800GTX on Wine. Texture pop-ups are just a bit too much though and so far the game did not impress me too much.
Played the first mission.
Bullshit:
-The unskippable intro sequences
-The menu. Mouse speeds are all wrong and the menu is slow to use (console crap, just like UT3 had).
-The UI. I could not figure out how to use grenades.
Bad:
-Protagonist feels like a little sissy. Get hurt stepping down a 1m step. Screams like a girl when I crash the buggy yet there is no (other) punishment of doing that.
-I also cannot stand that US soldier look. Immediately anti-reaction.
-Health seems irrelevant and auto-generating? There is not even a display.
-The wingstick minigame was a trivial joke. Console design for controller aiming.
-Environments are indeed super static. There is nothing you can move or destroy.
-Clipping is done badly and obviously. There are steps you cannot jump over when there are other places with the same height where you can. And the first driving sequence was ended with a fucking joke, look at that HUGE EDGE!
http://i.imgur.com/t2BNd.jpg You have to dismount. They could have made a bit more believable at least...
-Binding the Z and Y keys is broken on a QWERTZ layout.
-The music is really really bad. While some small cues were nice, the background music is like a cheap amateur horror movie soundtrack. Really bad. I will turn it off even if I miss "immersion and subtle cues" by that. Stupid cheap orchestra. No connection to a wasteland at all.
-The first mission had a huge areal but it was a corridor mission on fast rails. No interconnectivity. Might be just the first mission. :-) But it felt like a huge waste. I think the engine would rock for explorative games (apart from the staticness).
-When I returned from the mission that Hagar guy said something like "you already noticed, we got hit by mutants". Well, no, I did not notice anything.
-Weapon feedback is shallow so far. Doom3 was much better. The blood looks weird, like plastic goo. No gore at all (I feel weird saying this, but I actually miss it while I normally hate it).
Good:
-You do not HAVE to aim over sight, just firing with the UI crosshair is accurate and easy.
-Loading is quite fast. Loading the wasteland takes ~10 seconds for me. Loading that first mission is 6s.
-Characters seem great so far. Good looks, good voices.
Awesome:
-Once the textures are fully loaded (fractions of a second for me, I did not yet try any tricks) the looks are just amazing. But as I said, all you can do is look at it. Clipping/steep surfaces are everywhere.