Set across three defining eras from 20 years of Sonic the Hedgehog video game history, the instantly recognizable environments of Sonic Generations from SEGA for the Nintendo 3DS have been re-built in stunning HD and are now playable in both classic side scrolling 2D from 1991, as well as modern 3D style found in Sonic's most recent adventures.

Sonic Generations is a single player action-platforming game that blends 20 years of the adventures of Sega's iconic video game hedgehog into a single release not to be missed by longtime and new fans alike. Travel through time, sprinting through side-scrolling levels on a race for rings as you play as either the modern version of Sonic or one inspired by classic game releases on Sega specific gaming consoles from the past.

As you travel through Sonic's history elements such as attacks, available power-ups and other features remain consistent with franchise gameplay history as well, with the main difference being that players have the ability to choose which version of Sonic they would like to play as.

Sonic Generations is the ultimate celebration of 20 years in Sonic gaming, delivering the definitive gaming experience for Sonic fans new and experienced. In Sonic Generations, Sonic's birthday and universe is thrown into chaos when a mysterious new power reveals itself, creating time holes which take Sonic and his friends back in time. While there, Sonic runs into some very familiar characters from his past including a younger, classic version of himself.

Together these two Sonics must defeat their enemies, save their friends, and find out who is behind this diabolical deed!