DeadΩAegis: Gaiden

Humanity's first contact with aliens was far from peaceful, and now these hostile monsters from another galaxy are coming for the destruction of Earth. Every attempt to push back the advancing waves has been met with tremendous losses, as conventional weapons are practically useless against these invaders. Now in humanity's darkest hour, there is a new beacon of hope in the form of Special Warfare Troopers, known to some as just "magical girls". [From Steam]