its a 3rd person cover based shooter.
a fantastic game, every choice you make, and everything you do, whether you think it has an effect or not has an effect on something else in the game. The order you do missions, how you complete them, how talk to people, do you kill your enemies, or do you disable them. Everything has a consequence. Not to mention it has a great story, with alot of twists that you wont see coming, which make you question all the actions you have made previously.
There is alot to the game. The dossiers in it give you insight into the people you meet, and can help you make decisions about them, also you want to pay attention the body language and expressions, along with their voice to help figure out whether they are lying and such. And you have to do this while on a timer because you have to make your talking decisions very quickly.