Robot Invasion: Earth Battle

The sky is on fire! Humankinds great war against space invaders has begun. In the near future, humankind will be dragged into a new World War – a struggle against a mighty and mysterious alien race. Huge mechanical warriors arrived through a portal in the skies in order to enslave our planet. These massive robots are landing in the streets of your city, threatening us with their advanced space technology. But the invaders underestimated humanity: the people managed to rally the remnants of civilization, blow up the portal, and destroy the connection between the alien conquers and their robots....