At least a 9. Look how many of you tools and -blam!-tards have played 500, 700, 1000 -blam!-ing hours on this game. That is half a -blam!-ing year of WORK (based on a 2000 hour work year). Any game that takes up that much of your time is a 10. If it's not, then you are seriously -blam!-ed up! That is all! It's a 10 for me!