Smidlee on 01 October 2009
Civilization 4. Tons of replay plus the mod "Fall for Heaven 2" is almost a completely different game. Civ is a strategy game.
If you are not crazy for a TBS: a game I played a lot over this past year is Mount & Blade. It's action/RPG/"open end" game in Medieval times (but no magic just steel and arrows) that has a lot replay value including user mods. I'm waiting for the expansion that coming out this fall.
