The ATV is the fastest ground vehicle in Red Faction. The ATV provides decent protection against bullets, however, missiles are very effective against it. It has the machine gun mounted on the back, but it can't be used while driving unless another person is operating the vehicle. Two can be found in Red Faction, one in the Martian Canyon and another near the entrance to Capek's Zoo.
In Red Faction II, a wheel-less ATV can be located outside of a burning warehouse, during an attack on the Citadel. More of these ATV's can be located during the Second Martian Uprising, stunned across the various sectors of mars.