Re-Volt 2 is more of an upgrade which incorporates a move to freemium payment model (vote here on how much you like in-app purchases). The maps have tweaked and some new vehicles added with the free to play challenges & in-app purchase access to additional upgrades & the multiplayer grand prix mode. Game-play itself is buttery smooth, but 1 issue I had with game was severe lag while navigating the menus. Press an option and be prepared to wait for as much as five seconds to see a response.
Wind Up Knight 2 Android Game Description: This Game is basically 3D Side-Scrolling Game that has been made by the well known Robot Invaders which is now available on the App Store. Also easily on Android Market as free or paid content, requiring by the user.