Extremely addicting, great game. Though I am having trouble with crystal in all of my games where some of the achievements aren't coming up.

Fantastic application in everyway, but can you please give it the capability to find intercetions, PPPPLLLLEEEAAASSSEE!!!!!!!!

This is the best tower defense game ever, it is extremely addicting!! Just realized this game has add on levels so sorry about my last comment.

Works fantastically on both windows vista and 7.

Just got this game and I can't put it down, why it is only 3 stars Is beyond me because it really is an amazing game.