Six of the finest soldiers alive set out once again to brave a hellstorm of bullets in the seventh entry of Metal Slug. The story centers on the Peregrine Falcon Strike Force and the SPARROWS as they search once more for General Morden and his army. Their mission is to catch General Morden and stop his plans for attempting another coup d'état on the government. But as soon as Morden was defeated and failed, a strange army from the future came to his aid and strengthened his army. Now they must face Morden once again with his strengthened army and this time, put a stop to his plans once and for all.

Play across 7 challenging and varied stages