http://www.overclockersclub.com/reviews/darkest_of_days_testing/4.htm
The overclockers review of the game speaks truth.
I played the game with an ATI card and I while I did beat the game the graphics sucked to me. So, I'm going to buy a Geforce card and put PhysX to high to get the best of this game.
The positives:
I liked the period specific guns. The civil guns that forced you to reload after every shot. Or the sniper rifle in the civil war where you could shoot and stay zoomed in to see if your target fell or where your targets are going.
I liked that the enemies will attack your allies and that your allies were competent troops. If there was no one but you close enough to be shot, they would shoot at you.
I liked that they would chase you if they were alerted to you. In one civil war map, I was chased back from the middle of map to my starting position because I screwed up the quick reload mini-game.
I played using the keyboard and trackball, so I don't know what it's like with the xbox controller. I'm going to try that after I get my new Geforce card. I liked that 8monkeys have already put out an update that fixes some bugs in the game.
I liked that for the first time in any game, the grass could actually be used as cover. In all other games the grass in the fields are nicely mowed down prior to your arrival. Like I'm fighting in a golf course.
I loved the addition of the blue aura enemies. You can either not kill them and get points to upgrade your weapons or kill them and get future enemies troops that fight you. If you kill them, you can keep their weapons which in some cases are better for close combat in the civil war. For long range I found the civil war weapons were superior to the future guns which I find hilarious.
I thought the game was gonna to end with a boss battle and was disappointed when it didn't. Although the secret level was a nice addition.
The story was stupid and I wish they had put more effort into it. I did like the prison sequence of levels but the ending like Yahtzee have said is stupid. They should have placed in the beginning cutscene, "You don't join us or follow our orders, we will send you back to your moment in history to die." That would have made a world of difference in the story of this game. ... hmm I guess i'll go to their forums and post this.
[edit]
the future weapons you were given were annoying though. I wish instead of those weapons you got like upgraded versions of the old war weapons.