In case you didn’t know who was developing Radiant Historia, this trailer will get you up to speed. Staff from the Persona team and Etrian Odyssey are developing this Nintendo DS game.
Squint halfway through for a look at the grid battle system. Tiny, twirling mini-movies show a player selecting skills and fighting monsters. Radiant Historia comes out on November 3rd so a clearer trailer can’t be too far off.