I've always considered Civilization one of the greatest games of all time. Civ 1 almost cost me my girlfriend and a college degree. Civ II was an even better game than Civ 1. Civ 3 left me dissappointed. I've been wanting to check out Civ 4, but never had to time for it. I wonder if it's the bargin bins yet, I've heard a lot of really good things about it.

As to multiplayer, I guess I'm weird but I've always enjoyed the single play turn based aspect of the game.