There's a new game out called "Spore" by Electronic Arts. It was designed by Wil Wright, the designer of SimCity. In Spore, the player evolved a species from a single-celled organism to a pan-galactic empire interacting on-line with other player empires.
I don't own Spore. I'm afraid to buy Spore. Given my previous addictions to SimCity, Civilization, and Masters of Orion I am deathly afraid of the addictive nature of Spore.
Spore: Be afraid. Be very afraid!