I upgrade NaaC to Top Pick. I find myself coming back to this game quite often when I have some time to kill. The challenge is there as the this game has unforgiving waves of monsters and bosses for you to fight. You have to use a bit of strategy and discipline to keep yourself from using your weapons too soon as the regular hordes can be quite difficult but those bosses...they are just no joke. This game is a great primer for those that need to get their top down shooter skills up!
Edited by Megazell, 23 October 2012 - 03:43 AM.