Space marines never say die… Commander Andrew Ritchie swore a vow to exterminate the insect-like aliens that devastated humanity. But when his latest battle turns into a rescue mission, Andrew's medical background draws the attention of a high-ranking officer who reassigns him to the Valkyrie Corps. This new medevac unit is a game changer, combining Andrew's skills as a Medic and a Combat Marine. State-of-the-art Valkyrie power armor allows him to annihilate aliens while simultaneously saving human lives, giving Earth's forces a fighting chance against their ruthless enemy. But the alien roaches aren't about to scurry away in defeat. When Andrew's team plunges into a hot zone of death and destruction, the secret behind the enemy's carnage is brutally exposed. Andrew and his squad must now dish out one hell of a serve of vengeance. Or else their next battle may be their last…