Reaper battle walkers are among the most feared of ground forces deployed by the Martian Menace, striding swiftly through city streets and prioritizing the destruction of any defenders they encounter. Noted for their tremendous facility in climbing over barricades or crossing rubble, they have proven to be implacable foes. Harvesters, as their name implies, are sinister elements of the Martian Menace that prioritize and facilitate the capture of living subjects. They also assist in gathering other needed resources required for the depleted Martian home world.