Metal Mech: Man & Machine is a side-scrolling action platformer for the NES where the player pilots a heavily armed mech suit. The mech can move left or right, jump, and fire a variety of weapons to defeat waves of enemy robots and bosses. Power-ups grant temporary upgrades such as rapid fire or shield protection. The game features single-player missions with distinct stages and a futuristic storyline about humanity's struggle against rogue machines.