Spore

After playing this almost nonstop for 6 hours I would have to say awesome. You start as a single cell organism you choose either carnivore or herbivore and you eat meteor pieces to gain DNA points and to progress eating lesser creatures unlocks more body parts. Eventually you get to go on land. You can make alliances with species or make them become extinct.  Then you become tribal and have buildings etc. I made it to the civilized stage before I had to leave for work. You design every thing vehicles boats buildings everything and your actions effect  how your things will act and powers mine are aggressive.

 Those who do like computer games should consider buying this I warn you it it is very addictive.