Sell Wii Games. Get Cash for Sonic Riders Zero Gravity. New gravity-altering powers can transform walls into tracks,or create a "black hole" that sucks players through for the ultimatespeed boost, and allows for an entirely new way to gain a leg up onyour competitors. From illuminated highwaysin a bustling metropolis to the outer reaches of space, race at thespeed of light on 16 dynamic courses. Vehicles with over 40 upgradesallow you to grind rails and pull off daring tricks on futuristictracks, including solar loop-de-loops, height-defying vertical dropsand tonnes of other edge-of-your-seatmoves. As Sonic or one of 18 colourfulcharacters, players will compete with up to three friends atheart-stopping speeds in three exciting multiplayer modes. With all theaction, speed, and addictive gameplay that only Sonic can deliver,Sonic Riders: Zero Gravity is set for hyper-drive! Brand new ability to controlgravity Once you rack up Gravity Points throughtricks and technical challenges, you'll enter a zero-gravityenvironment with new Sonicabilities: * Gravity Control: Witha push of a button, you can change the law of gravity and alter coursesby turning walls into new tracks filled with shortcuts and alternativepathways. * GravityDive: This gravity-defying dive creates the ultimate speedboost, hurtling objects from the path and allowing you to grind onobjects and cars that are floating in the air. Hapless competitors are left far behind. Over40 ways to upgrade your vehicles Players can switchup their vehicles, even in mid-race, to best suit their racing style.With transformations that include a hover board, motorcycle andfuturistic hover craft, multiple options for upgrading ensure that notwo vehicles will be the same. Depending on the vehicle upgrade, hiddenroutes may be uncovered, such as gliding on the air at the bottom of avalley, or riding through thick walls. Now, whether the terrain iswaterway, highway or jungle, the action never slowsdown! New tricks and abilitiesincrease the challenge You can now air board onwalls, pull gravity-defying tricks and even grind on cars that arefloating in the zero-gravity environment! With these new moves,cornering becomes more intense and the pace is brought toheart-stopping speeds! Three fast,fierce, and fun Multiplayer modes You can competeagainst your friends in three exciting Multiplayer modes: Free Race,World Grand Prix and Survival mode. In the Wii version, you can alsodownload ghost data to hone your racing skills and beat the topriders.