Tactics Ogre: The Knight of Iodis?

It is awesome. I have spent about 100 hours on it. What I like most is that there are many paths to choose from that have both benefits and consequences. For example, there are two friends of mine, and I save only one. The other friend will turn to evil while I blame myself. There are many different endings and story, but overall, it's worth the full price of a new DS game, IMO.