In Vol'Talkes, you play in the role of Captain Ben Kincaid, a Commander of the Allied Defense Force, a military organization that was founded to protect mankind from alien attacks.
With the development of so called CAIs (crystaline artificial intelligences) mankind discovers the opportunity to embed the personality of a human in a crystalline device and thus empower it with almost infinite computing power. Unfortunately these CAIs are not accepted as equal individuals by the human race and so, after years of oppression by their creators, they start to rebel against them and a war begins, that will define the future of mankind in the universe.
But the story is not carved in stone. On your journey with Captain Kincaid you are forced to make decisions, which will often push you in a conflict between moral and obedience and most of the time there is no real black and white, but various shades of grey. Thereby the story evolves in different directions and the type of available units and possible partners for alliances will change dramatically.