Metal Arms consists of 42 separate levels. Here, the player will take control of the game's main protagonist, Glitch, viewing his actions through an over-the-shoulder third person perspective. Over seventeen weapons are accessible to the player, most of which can be upgraded through the use of upgrade kits strewn about in various locations in the Campaign.
Although level design for Metal Arms is linear, there is more than one way to complete objectives. The game provides a multitude of standard-fare shooter weapons, such as flamethrowers, machine guns, various types of Grenades, shotguns, rocket launchers, et cetera, to push through levels with brute force. To contrast, it also includes a relatively unique weapon- the Control Tether. The Control Tether, as its name implies, allows the Player to directly control enemy forces and use their own firepower against them.
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Arm Servo: Glitch's Arm Servo determines the speed of his arms. As he gains Arm Servo upgrades, he can switch weapons faster and even reload most weapons faster.
Batteries: Batteries are a Health analog for robots on Iron Star. Glitch is capable of housing 6 but only starts the game with one.
Secret Chips: Strewn throughout the game are yellow processor chips called Secret Chips. Some must be located by either destoying a certain bot, moving objects such as crates with the Loader, or even buying them from Shady and Mr. Pockets.