Vestibulum War Windows game

You are a soldier of the future Earth of Vestibulum War. However, which faction you are born in to is for you to choose. The humans have been living on earth since they became a known species. They are well rounded, have resources, and are experienced in warfare. They are lacking in the technology field, though. As other factions have well surpased them in few years of life. -- The Mantis are a large faction of an alien race called 'Mantis'. They wear extensive gear and robotic functions to be able to sustain life on Earth. They are advanced in many technological ways but have some attributes others would kill for. -- The unknown are a faction of rougue robots that once fought for the humans against the Mantis. Little is known about them.