If you own an Xbox360, you should check-out the demo of this. Free. The game is $10 bucks -- 800 Microsoft Points. The presentation is very good, and the game is evenly balanced. So, even if you mess-up here and there, you can still win the scenario. I love tower defense games, it's like heroin that's good for your brain. Having to come-up with strategies and hoping they're right. Oops, changing the game plan, trying something new.