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. 1-4 players. Accompanying material may vary. Warning: if you have a history of epilepsy or seizures, consult a doctor before use. Certain patterns may trigger seizures with no prior history. Before using and for more details see instructions for this product.