Just got through a full multiplayer game, it goes to 11 waves. It gets ridiculously intense. I feel like I am going to get addicted to it, it's leveling system is fun, and the item system (where you buy a pack of random items) hits the same nerve buying Magic cards does with me. I'm an addict. Haven't tried the single player yet, but I love the combat. The dodge is a little iffy to get used to, and I'm really not that great at taking cover, but damn. It's fun.