Available on the Xbox 360, you can download this game from the game marketplace.
This game is definitely worth the purchase. The voice acting takes the game from good to amazing. It features great music and stellar artistry. The downside to the game is that occasionally it's difficult to tell where the ground ends and the sky begins, however this aspect also adds a little bit to the challenge of the game, so it isn't a very large downside. Overall, if you want a game with an interesting story, check out Bastion, it's well worth the 1200 Microsoft points to purchase it.