If you haven't yet grown tired of the abundance of space combat simulators on the market these days, then check out Galaxy Reavers, which is now available on Steam.
The RTS places you in control of a huge battle cruiser, which you will need to upgrade and customise if you want to survive against the onslaught of enemy ships and become the ruler of space.
So what are you waiting for? The universe ain't gonna conquer itself y'know. Space may be infinitive, but it sure isn't big enough for the both of us!