That was Rise Of Mankind, though it was probably included in the BUG mods. It named them like this:
Cat_Chi_Sta_RoM_Epi_Anc_1565-BC_Tem_Med_Aug-05-2012_13-32-38.sav
That means it named them by Leader, Civilization, Map Type, Mod, Game Speed, (Starting) Era, Time, Climate (I guess), Sea Level...