Eridani RTS
Eridani is a space based real time strategy where you build your base round the edges of planets. Mine resources from asteroids to build various combat ships and interplanetary missle that are fired from the planets surface
Lunar Commander This is a RTS game, where you can build your mines and barracks, power plants, etc., and make a large arms before the enemy comes, then you need to protect your base from waves of enemies to.