3D SEGA Classics 3D Sonic The Hedgehog and 3D Altered Beast are now available on the Nintendo eShop for $5.99.
In 3D Sonic, players are on a quest to rescue the animals snatched by Dr. Eggman (Robotnik). Aside from streoscopic 3D support, the game has a zone select feature and Sonic can use his Spin Dash move which was introduced in Sonic the Hedgehog 2.
You can play as a beast-turning warrior summoned by Zeus in 3D Altered Beast and rescue Athena from Neff. The game supports local multiplayer and Random Transformation Mode.