Sonic Generations, released for the Nintendo 3DS in 2011, is an action-packed platformer that celebrates the 20th anniversary of the Sonic the Hedgehog series. It features both classic and modern versions of the iconic blue hedgehog, combining retro side-scrolling levels with new 3D stages. Players can enjoy the rich history of the franchise as they zoom through beautifully rendered environments, defeat familiar foes, and save the world from time collapse, showcasing a mix of old and new gameplay mechanics.