Ten seconds into this trailer for upcoming DS title Fractured Soul, it doesn't look like much. Then the action pans back, and you see both screens, and suddenly things get interesting.

A hybrid platformer/shooter from Australian studio Endgame, Fractured Soul takes the light/dark mechanic found in so many games and makes it a little more immediate, by making use of both DS screens at once. You're controlling the same character in both screens, only he may be in two completely different locations at once; on the bottom screen he'll be in a base, and on the top screen, underwater.

Looks neat!