AIs usually sucks in strategic games. The first game is a practice game, played on Chieftan. The second time I played, I played on Deity (Vanilla Civ3), I found myself far behind. Oh! The AIs were so strong. How come? I used to be able to win easily after a few practice? Later I realised these AIs cheated heavily in the game. Interesting since only AIs with cheating bonuses can give me some good challenge. I learnt a lot about Civ3 before playing my third game. My third game started on Monarch. Won easily. Then I moved up to Emperor. It seems I can also win pretty easy. Now I am playing C3C. I'm currently playing at Emperor/Demigod. I'm moving towards the hardest level (Sid). But since I hear most able players say Sid is crazy, we can hardly win. So I think I will finally play on Deity most of the time, and a few Sid games for real challenge of luck + strategies + dirty tricks (eg RoP rape, but no exploit to game bug). So I guess I will usually play on Deity ultimately.