Corridor 7: Alien Invasion

In the year 2012 it was finally possible to send a space ship to Mars. The scientists returned with a small object of unknown origin, which was supposed to be a proof for the existence of life on the planet. The object was taken to a special underground research facility and secured in its lowest labs, down “Corridor 7”. Exposed to gamma radiation, the mysterious object caused a portal to appear, which connected two worlds. The Alien invasion began. It’s time for you, a brave Special Forces agent, to descend to Corridor 7, where the fate of humanity must be decided.