Players are on a mission to protect this place as safe and serene. Take your weapon, hold it firmly, and prepare a steel spirit to overcome each barrier. There are over 150 challenging fights to explore, several places and modes to play, and hundreds of different varieties of enemies to defeat. Monsters get increasingly hazardous, crowded, and powerful with each task. If your hero or equipment is unable to level up, mankind will be in grave threat. Control the gunner to avoid enemy gunfire and destroy them to become the ultimate winner.