Dark Colony is awasome RTS game. It was created in 1997 by GameTek. Action of game take place on Mars in 2137. Humans discovered great source of energy named Petra-7. Unfortunetly some Aliens comes to the planet and want to get rid of people. You can play 2 campaings: Humans and Aliens.
I remember playing this game when I was a kid. It was brilliant and still is. Beautiful feeling comes when you remember old times. Download it here for free and have some fun. Awasome game. Thumbs up!