Without a question it would be Stronghold: Crusader, got it from a friend when I was less than 10, and racked up way to many hours playing that game, now that I look back on it, I realize, ``I was really shitty at tactics at a young age`` now i`m a little better, and i`m certain that if I were to go back to that game now, i would hand the AI`s their asses, because tactics extend further that just having as many cheap, unarmored units as possible, unless I plan to SLAVE RUSH, with more slaves (armed with only torches, and armored with their immense numbers) than common sense should dictate possible
EDIT: oh, and runescape, me and my friends played to much of that too, thank goodness I was both to young and to broke to get into WoW, or I would have become fused to a computer at all times.