Have you played Orcs must die 1 or 2?I used to like castle defines games, and never thought of such a good implementation and actually an upgrade to the usual gameplay! the Orcs must die 2 has the ability for co-op (2 players online) for extra fan. Bought this game recently(It's not so high priced) and give it an A+ ! Look at the video to get a bite of what it looks like.