This may be one of the most addictive games ever..

User Rating: 9.5 | Sid Meier's Civilization III PC
Civ 3 is a classic masterpiece, even though its the 3rd in the set of games. It is truely one of the best if not the best strategy games ever, in my opinon, it is the best. There are so many game modes, and different Civs and enemy civs to conquer. Or, if you want, you could have a one-on-one, or just your own people, fighting against barbarians. Or you could turn off barbarians and just race for technolgy.It is all up to you. Also, you can head over to the custom settings and change the entire game.If you have the play the world pack for the game, you also get 5 or 6 extra nations to play around with, like the mongals or the spanish. Also, if anyone noticed, i said this games difficulty was just right, this is because of the multiple settings to change your oppontents crafty and aggressive behavior.