Trine 2, is being sold at half price on Xbox Live Arcade for Gold Members this weekend. That means you can pick it up for 600 Microsoft Points ($7.50) through July 2nd.
Before you do that, though, remember that the time has almost come for another Steam Summer Sale, and your wallet's almost certain to take a beating. Trine 2 is a great game, and if you want to play it on Xbox this is a solid deal. We're just looking out for you, man.