Sonic Rush

Sonic Rush is the name of a game for the Nintendo DS. Sonic Rush capitalizes on the 'dual screen' aspect in three ways; one, it uses the two screens like one extended vertical screen, for very steep climbs and drops; two, the game centers on two parallel universes colliding; three, the game features two hero characters, Sonic and Blaze.

The game is combination of 2D (for standard fights) and 3D (for boss battles). The stylus of the DS is largely unused, except in map mode and for special stages.

Story
The game's story centers around two characters in two alternate universes, Sonic and Blaze, as they both try to save their world with the use of the Sol Emeralds. However, the more they obtain, the more their actions have a 'ripple effect' on the other world. In gameplay, this means that what Blaze does in her game will effect what Sonic can do in his, and vice versa.