Just finished the game (on GForce 4 Ti 4200, 64 mb, - 800x600, medium detail).
Better than expected. Excellent at the begining, gets worse at the end.
The flashlights and your fellow marines are cool, and the most memorabble scene is the landing of the USS Hanibal. Damn, it's blasted those defensive turrets in a second and it's huge! When it finally lands you really do feel like an ant.
Other than that, later it's gets too much into that one man army ****. You against a kazzilion overpowered enemies that for some reason can take a whole arsenal before going down...
And that "everyone else failed" crap. I hate those million setbacks that you and only you can fix.
they should have jsut nuked the whole planet.