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I n contrast, the PlayStation 2 and Wii versions of the game represent available Boost using bars, which may be added by performing "Action Chains", destroying multiple enemies in quick succession through the use of homing attacks, or by collecting rings. For instance, a new sidestep feature known as the Quick Step is available, allowing Sonic to dodge left and right, and a Drift feature, which allows Sonic to make tighter turns without slowing down. The game also features a gameplay mechanic previously used in the Sonic Rush series called the Sonic Boost, which greatly increases Sonic's speed, allowing him to smash through objects, destroy enemies instantly, or even access different level paths.In the Xbox 360 and PlayStation 3 versions, an on-screen "Ring Energy" meter displays how much boost is available.The amount of boost remaining may be increased by collecting more rings, and is decreased by using the Boost. In addition to moves available in past games, such as the homing attack,new moves are also introduced. Daytime levels focus on Sonic's speed, and to this extent, sees the player control Sonic through fast-moving stages containing both 2D and 3D styles of gameplay. 2D sections are reminiscent of the Mega Drive/Genesis-era Sonic games, where the player controls Sonic in a side-scrolling fashion, while 3D sections see the camera placed behind Sonic, so the player may move in all directions.