There are 3 vehicles that can be boarded and used in Metal Arms. They usually provide a strategic advantage, because they provide the player with more firepower (without having to use any of their own ammunition) and armor.
RAT[edit]
(Rapid Armored Transport) A fast, six-wheeled vehicle with a .30 cal S.P.E.W. turret mounted on the back. Players can either drive the vehicle, or man the turret. There are three levels in the game based around this vehicle, as well as multiple other levels where it is featured in some manner or another. It can crush small enemies.
Loader[edit]
A small mining hovercraft. It can hover over water and other similar liquids, allowing access to areas normally unattainable. It has a S.P.E.W. mounted on its front, as well as a large claw which can pick up small enemies, rocks, or other small objects.
Sentinel[edit]
Easily the most powerful vehicle of them all. The Sentinel is a large tank, with a powerful S.P.E.W. turret and a large powerful, turret, all controlled by just the one player. It can crush small enemies.