It's a pretty good game, and not too hard. But it requires multiple playthroughs to get all the achievements. Also it seems, that it is based on luck, to hit an enemy, even if you aim directly at him. (with low weapon skills, that is)
It's an underrated game, I'd say. It is fun, but having to play it thrice to get all achievements takes a bit of fun out of it. On the upside, it is a 1000/1000 OFFLINE game
New XBL Profile since October 30th 2013.
Completed Retail Games (includes all DLC): 33
Completed Arcade Games: 25
Completed Xbox One Games: 32 (includes all DLC and Apps):
Completed Windows Games: 2 (includes all DLC)