Have you ever hear of Age of Empires? If you havn't... you're lost. Age of Empires 2: Age of Kings and The Conquerors. There is a website called aokheaven and it is a huge place for aok and aok:tc mod packs. I found one called The Age of Chivalry:Hegemony, it is a complete conversion of the old game and is WORTH IT. IT includes a custom Campaign that uses several of the different civs, new techs, 3 civ classes, urban, rich, (fogot 3rd), dif techs and buildings, and tons of stuff! The one big downside, if you want to play a single player random map, you have to set resources high, and include a higher difficulty, (But for some reason they don't attack?)
All I gotta say is go and get it, it's worth the download.
Lamenting is the opening to the world of night.