Sonic Unleashed - Daytime gameplay consists of two modes: 2D side-scrolling platform gameplay, rendered with 3D visuals, with seamless shifts to behind-the-back, third-person stages.[14] Concepts returning from past games include Sonic's trademark high-speed gameplay, as well as improved lock-on for automatically targeting and hitting enemies.[3] Sliding across the ground also returns, and a new feature, Speed Drift allows Sonic to slide around a corner at high speed. Players will also be able to perform a new side-step maneuver known as Quick Step,[14] allowing Sonic to instantly dodge obstacles to the left or right. As the player goes through the game, Sonic gains experience points, and will be able to upgrade his abilities.[5] An on-screen Ring Energy meter can be filled by collecting rings, which is used to activate a temporary speed increase known as Sonic Boost, during which time the camera uses a fish-eye effect and motion blur; hitting enemies and obstacles will reduce the meter.[11] Action Chaining allows the player to collect energy more quickly, by collecting rings faster[18] or by stringing together sets of actions, including button input sequences, some of which will be in midair.[4] Repeated action chains will allow the player to perform special moves or access different routes in the level.[4] Shield pick-ups from previous games will make a return, protecting Sonic from various hazards.[19] The Wii version features some motion control mechanics; whilst movement is primarily controlled using the Control Stick found on the Nunchuck, actions such as shaking the Wii remote may either activate the temporary Sonic Boost, or allow Sonic to perform the Homing Attack move.
Quelle: http://en.wikipedia.org/wiki/Sonic_Unleashed#Gameplay.