GTX Studios is a new-start game development studio, with it's primary focus on utilizing the excellent technology of the Darkplaces engine. Originally, when we first decided on starting GTX Studios, we planned to use the UDK which uses the Unreal Engine. While we still plan to utilize this in the future, for now, our next release will be based entirely on the Darkplaces engine. You can read more about this on our tech pages on our website.