Sonic & All-Stars Racing Transformed was released on November 16, 2012, and supports multiplayer for up to 10 players online, with local split-screen for up to 4 players. It is an arcade-style kart racer featuring characters from the Sonic universe and other Sega franchises, with vehicles that dynamically transform between car, boat, and plane during races depending on track sections. The game features modes such as Grand Prix (championship progression), Single Race, Time Trial, Battle Arenas, and Online Ranked and Custom Lobbies, emphasizing drifting mechanics, boost management, and strategic item use across varied, transformation-based tracks.