Sonic Generations

“The 3DS version follows similar gameplay to the Sonic Rush series for Modern Sonic, and features a different set of levels to the console and PC versions, some of which directly recreate the layouts of classic Mega Drive levels. As opposed to the Skill Shop in the console version, abilities are unlocked as the game progresses, with Classic Sonic learning a Homing Attack and Modern Sonic learning a stomp. Exclusive to the 3DS version are Special Stages, similar to those of Sonic Heroes, in which players must collect balls in order to gain boost to chase after a Chaos Emerald. The game features 100 mission stages which are unlocked either by progressing through the game, meeting other players on Streetpass, or spending Play Coins, as well as both wireless and online multiplayer modes, in which two players can race against each other.”