This mission based action-adventure is set in the solar system Theophilus, in the distant future. You play the role of Sho, a private detective. Early on in the game you are drafted by the Intergalactic Agency of the Galaxy, and quickly become the leader of special G squadron whose purpose is to protect Theophilus from the invasion of an alien race called Mutons.
Travel around the six planets of the solar system, in a plethora of surroundings, including a vast desert, an underwater metropolis and a floating city. Fight against overwhelming odds, as over a thousand enemies converge upon you at once. Blast through them using your improving abilities, state-of-the-art customizable weapons and powerful psionic energy blasts. Can you save humanity from extincton?