Today I finished the DS game Ghost Trick: Phantom Detective, and I was blown away by it. I highly recommend it to everyone with a DS, especially if you like puzzle-oriented and story-driven games.

You play as a ghost who has lost his memory. Through the power of "ghost tricks," you can manipulate objects and turn back time to stop people from dying...all in a quest to find out why you were killed.

The story is amazing, the characters were great, and it had moments that were downright hilarious (in addition to moments that were heartwarming, creepy, or just made me want to cry). It was really, really great.

And better yet, there's a free online demo (wait a little bit for it to load):
http://www.gamespot.com/misc/presentations/ghost-trick/index.html