Sonic Generations blends classic and modern Sonic gameplay. Players alternate between 2D side-scrolling and 3D platforming as they travel through levels inspired by previous Sonic games. The game features a mix of nostalgia with updated graphics and design, allowing Sonic to experience both past and present. It includes numerous iconic levels, diverse environments, and a new story involving time travel. The game is celebrated for its fast-paced action and smooth gameplay, appealing to long-time fans and newcomers alike.