The Baten Kaitos sequel thread got me thinking about this subject. What are some of the most underrated games you all have played? Baten Kaitos Origins is definitely one of mine. It was one of my favorite RPGs last generation and few people played it. Namco's substandard localization of the original game turned a lot of people off to BKO.

Vandal Hearts 1 for the PS1 and the Ogre Battle series (Ogre Battle: March of the Black Queen, Ogre Battle 64 and Tactic Ogre).

Suikoden 2

Guilty Gear XX

The Guardian Legend (NES)
Battleclash (SNES)
Metal Combat: Falcon's Revenge (SNES)
Virtual Boy: Wario Land (VB)
Star Wars: Shadows Of The Empire (N64)
Battalion Wars (GCN)
Battalion Wars 2 (WII)
Art Style: Rotohex (WW)
Art Style: Aquia (DSIW)

Final Fantasy VII. I don't understand why half the people on any given internet forum don't use Cloud avatars and constantly clamor for a remake of this hidden gem.

Dark Cloud 2

Infinite Undiscovery, Lost Odyessy, The Last Remnant, Star Ocean: The Last Hope, and Tales of Vesperia.

...

In my case, Geist.

I had a lot of fun with that game, I didn't expected to be so good. I home to have the game playable on Wii with the remote and nunchuk