Excellent!
What a great game. The strategy part really blends in well with the shooter/action part of the game. It's also fun to have such a big variety of weapons to choose from although I found the assault rifle a bit weak, but maybe it's just me. As for the difficulty level, it's pretty challenging, especially with the soldier-zombies that are bulletproof except for the face and the ones that run, but it's not extremely hard either. Overall, it's a very fun, addictive game that kept me going for the whole 20 nights. 10+
On a side note: Who doesn't enjoy shooting clowns, especially when they're zombies?