All the reviews were bad on this game, but you should try it. It feels like a grade A shooter but smaller, thee only complantes that I have is some cheap deaths and framrate issues. Plus I would of liked to seen a bigger campaign, but multiplayer is a blast, and if you want a great first person shooter that is mobile, you should rent this.
It's a standard FPS, which has a nice story and standard progression. I probably would have played the whole game, but there's a point early on in the game, where it becomes a mediocre zerg-fest. I generally like a good challenge, except when it the fun is mediocre. I found my self working through these segments, hoping for the next breath of fresh air, only to be disappointed. It might be your thing, but it really wasn't mine.