A really polished and well put together game that's just too damn hard. The difficulty makes combat tense and scary, and there's a lot of difficult decisions to make in the heat of things. You get attached to your soldiers, cheer when they kill and mourn when they are killed. This all is great on paper, but because of how hard it is I never progressed much, just treaded water in the early game. The upgrade system, while cool, didn't give me what I needed to push back the alien invasion. Too bad.