After nearly decimating all of mankind, humanity looked to the stars to rebuild their past glory. Under the guidance of a hero and his loyal followers, life was brought back from the brink, their legacy bringing forth peace that lasts to this day. But, trouble brews on the horizon...Play as Captain Junius Fahrenheit, a soldier of the United Terran Vanguard onboard the state-of-the-art ship, the Sierra, as they and their crew are thrown into humanity’s first interplanetary war. Tasked to protect Earth and free its colonies from under the Ares Confederacy of Mars’ grasp, there’s no question that they must fight to protect everything they care for......Are things really as simple as it seems...?Experience the first part of the story of Sierra Ops!Game Features Strategic mobile tower defense gameplay with shoot 'em up