I think you have to use a sliderscale here. 0% being not accurate in any way, 100% being totally accurate.

AOE is a game to start with, so there goes the first %. The time you need to play the game is a compression of real time, so there goes another % and so on. But it has ships sailing water, walls around cities, it mentions things that happened in human history, so it's more accurate than 0%.