From Sierra: In the year 2049, the governments of the world switched to unmanned aircraft for combat in an attempt to save lives. By doing so, they decommissioned thousands of jets and their fighter pilots, ironically destroying the livelihood of those they were trying to save. Years later, these planes appeared on the black market and were sold to the highest bidders. It wasn't long before an underground emerged, featuring ex-fighter pilots, smugglers and wealthy hobbyists piloting the decommissioned aircraft. In a competition of fight and flight, these pilots heavily modify their jet fighters to outrace and outduel the competition to win fame, glory and fortune. Welcome to the world of M.A.C.H.