Don't Be Fooled by all of this negativity, the game is quite enjoyable, despite the...okay...game play. The Storyline swept me away, amazingly enough it kept me intrigued, and i wanted to continue watching. The cut scenes were glorious, very well "shot", and the voice acting was beyond expectations.
Game wise idk what they were thinking The targeting system was very iffy, the fact that you could empty an entire clip into an alien, and see them not even recoil was an annoyance. Also the loading scenes took forever, and they were constantly popping up, the loading was the only real take away from the game.
I don't know if it recommended buying material, but its worth checking out, even though once you beat the game there's nothing really to do. lol I'm just waiting now for the sequel that'll never come