Homeworld

Homeworld's epic tale begins in the far reaches of the universe. You were the benign lords of a peaceful society located in the center of a lush spiral galaxy. For as long as anyone could remember, no one challenged your peaceful existence. But then came the conquerors, invading with the sole purpose of overtaking your world. Billions died, and the survivors were relocated to a cold, lifeless planet on the edge of the galaxy. Hundreds of years later, all knowledge of your previous existence has been lost. Only vague myths remain, until the discovery of an ancient tablet buried within the ruins of a half-destroyed craft in the great-banded desert. This Guidestone reawakened the knowledge of your ancestry, and set your race on the path home - coordinates leading straight into the heart of the galaxy. Sixty years ago, construction began on the giant Mothership that will carry millions of your people into deep space. Construction is now complete. Your journey to the Homeworld begins here...

Minimum system requirements: 

CPU: 233 MHz (x86 compatible)
RAM: 32MB
HDD: ~450MB
AND: Homeworld or HW:Raider Retreat / Demo data files, An SVN Account and WINE