Beautiful, beautiful hack and slash dungeon-crawler (if a shattered archipelago of floating islands in the sky can be said to be a dungeon) Bastion is now half-price on the Steam digital computer game distribution pipe. I would use this opportunity to direct you to John's review, where he implores you to buy the game. But you don't need to believe his big lying face, because there's also a demo you can play to try it out.
Then, once you have fallen in love with it, you can read this interview to learn a bit more about the making of this lovely thing. Hooray!