Play as Sonic, Tails, Knuckles, Mighty the armadillo or Ray the flying squirrel and save the world from the evil Dr. Eggman; includes all-new Encore mode.

"The ultimate celebration of past and future. An all-new adventure with Sonic, Tails, and Knuckles full of unique bosses, rolling 2D landscapes, and fun pixel perfect gameplay" --cover. "5 playable characters with unique abilities, vibrant new stages and classic zones, join a friend in co-op or 4 player competition mode" --cover. "2 new characters and all-new encore mode" --cover. Xbox single player; Xbox Co-op multiplayer: 2; Xbox multiplayer: 2-4. Warning: Read enclosed information about photosensitive seizures and other important safety and health information.