A demo for Orcs Must Die! 2 has landed on Steam. The Robot Entertainment action-strategy title has co-op this time out, and if you own the original on Steam you’ll automatically unlock co-op versions of 10 levels from the original game featuring new enemies. The game’s out on July 30, and if you pre-purchase it now you’ll get 10% off. You can also pick up the original game on Steam for $2.49 until July 30, which is a steal.