Sands of Destruction - Sega / Imageepoch (2008). Written by Xenogears scribe Masato Kato, this DS RPG also got an anime tie-in, but failed to make much of an impact. The super tall battle arenas using the two screens is its signature innovation.
Final Fantasy: The 4 Heroes of Light - Matrix/Square Enix (2009). A retro-themed spinoff of the Final Fantasy series, and predecessor to the Bravely Default series