鋼嵐-メタルストーム is a free-to-play role-playing game set in a near-future sci-fi environment where players engage in mech battles. The game is centered around the discovery of a new element, 'シエラム', which enhances mech performance. Players customize their mechs, known as 'ST', by modifying their heads, arms, legs, and weapons, creating a unique battle experience. Formulate strategies by commanding a diverse squad of pilots, each with distinct roles—from long-range attackers to close-combat specialists—allowing for varied tactical approaches in combat.

As players navigate the mysterious island of ミハマ, they unravel a storyline filled with intrigue and secrets. The game features a dynamic combat system where destroying specific mech parts can alter battle outcomes, such as immobilizing foes or disarming them. In addition to strategic gameplay, players can personalize their mechs with various paint styles and decals, making each creation truly one-of-a-kind. With a cast of unique characters and an engaging narrative, 鋼嵐-メタルストーム offers an immersive role-playing experience.