Zero Gravity

Sonic Riders: Zero Gravity is a 2008 racing video game developed by Sonic Team and published by Sega for the PlayStation 2 and Wii. It is a sequel to Sonic Riders (2006), a spinoff in the Sonic the Hedgehog series. In the game, players control Sonic characters as they race against opponents on hoverboards, using gravity to manipulate the courses; the game features several game modes, including a story mode involving Sonic and friends retrieving the "Arks of the Cosmos", a set of extraterrestrial relics that control gravity.