Description taken from PC version of this game

Online PC game publisher NCsoft moves from swords, sorcery, and superheroes to souped-up street racing with Auto Assault, a "massively multiplayer" game of vehicular combat, developed by Colorado's NetDevil. Set in a post-apocalyptic world reminiscent of Mad Max movies, Auto Assault has players taking the roles of futuristic road warriors, battling over the scraps of a crumbling civilization in their highly customizable cars, trucks, and cycles.

Players can choose to drive for one of three competing factions: the humans, the mutants, or the biomeks. Cooperative, competitive, and solo play are all supported. Compared to earlier persistent-world role-playing games, Auto Assault is designed to offer more accessible, action-oriented gameplay that doesn't rely on complicated experience systems or grueling "grinds" to reward players. Like most persistent-world PC games, Auto Assault requires an Internet connection and charges a monthly subscription fee for continued play. ~ T.J. Deci, All Game Guide