"Sonic Generations" for the Nintendo 3DS is a platformer developed by Sonic Team and Dimps, released in 2011. It celebrates the 20th anniversary of the Sonic the Hedgehog series. The game features both modern and classic Sonic gameplay styles, with levels inspired by iconic stages from past Sonic games. Players can control both modern and classic versions of Sonic as they speed through levels filled with enemies, obstacles, and loops. The game received generally favorable reviews for its nostalgic appeal and enjoyable gameplay.