The file refers to the second installment of the Sonic the Hedgehog 4 saga, a 2D side-scrolling platformer. Key features of this game include:
Hidden collectible rings (originally from Sonic Colors ) appear in each act.
Players enter these half-pipe stages by finishing an act with at least 50 rings. Successfully collecting a target number of rings earns a Chaos Emerald .
Players can team up with Tails through local or online co-op. Unlike older titles, Sonic and Tails cannot be controlled individually; they must work together.
Sonic and Tails can perform unique Tag Actions , such as the "Copter Combo" (Tails lifting Sonic to unreachable heights) or the "Rolling Combo" (a powerful joint spin attack).
Owners of both Episode I and Episode II on the same system unlock this bonus campaign, where you play as Metal Sonic through modified versions of Episode I's levels.
This episode features a revamped engine with fully 3D character models, enhanced lighting, and physics that more closely mimic the classic Sega Genesis games compared to Episode I.