Ghost Trick is a welcome surprise. Out of nowhere Capcom gives us what may well be the finest game on the DS. The premise is refreshingly original- you are a recently murdered soul out on a mission to find out who killed you. It branches off from there and introduces a bevy of lovable characters and an excellent plot to go along with them.
To say more is to spoil it. Just know that you're in for outstanding music, great animation (a certain dancing inspector comes to mind,) ingenious puzzles and a hilarious and beautifully poignant story. If you have a DS or 3DS, do yourself a favor and give this gem a shot.