the game has been out approx 2200 days. (6 years) I pretty much bought it on release. In the beginning I did play a LOT more. (remember sitting on a internetcafe with a friend doing 7pm to 7am multiplayer a few times too often in the weekends). Hell, I even had civ dreams in the beginning. Later I started to mod, and its a difficult line to draw when you are playtesting and modding, coz many times I do it at the same time. But... if its including CFC, modding and playtesting I guess it could be in the 4000+ if its without then maybe around 2000. Civ 5 on the other hand, maybe 3-5 hours.