In a futuristic utopia, an elite force whose goal is to maintain peace in the region comes to overturn the situation in the civil war that is raging. Two down-and-out mercenaries become space pirates, Grayson Hunt and Ishi Sato, getting involved in new adventures with explosive action. After a forced landing on the abandoned planet Stygia, as survivors they have two missions. To survive and emerge victorious from their battle with the mutated creatures and bloodthirsty alien beings that surround them, and to return to their planet alive in order to avenge the man who sent them there. Experience the thrill of frenzied gameplay and use unique weapons, unlike anything you've seen before in a first-person shooter game.