A must play!
Frankly, I have a HIS HD 6670 GDDR5, and I completed the game on hardcore (1366X768). The story is full of suspense and action. It's a mixture of human and alien foes. Also, you can enjoy kicking their asses your own way as you have multiple options available before you go through the hot-stuffed enemy area. You go straight and ambush, or simply cloak and hide and slip through.
But you must first try for Crysis (2007) and then go for this one, as it's a pretty well set sequel. Having a basic idea about Nomad, Prophet, Psycho, etc. is what you'll need to enjoy the first 10% and then followed by some in game videos. Nanosuit is no more the same here, as you have to collect points by walking over dead alien corpses you just killed , and thus, you can unlock Nanosuit mods and upgrade your suit your own way! What I liked about this game is that it allows you to plan your mission your way by giving you options. So, don't waste time on God Of War and go for this one!