well the geographical areas that those cultures originate from arent really included on the game map. the map only reaches as far east with the iranian border and as far north as the northern anatolian coast. the scythians lived far more north of the black sea. plus the scythians werent a thing yet in the bronze age. that place is taken by the cimmerians who were the nomadic predecessors of the scythians. they are in game and are pretty much similar. great cavalry. Persians/medes werent really an established people yet either and like i said the map doesnt include those lands. parthians? forget about it. they are too far east of the map as well and their timeline is way too far into the future from the Game timeline. it wouldnt make sense. might as well add classical Romans into the mix if you do that hahaha. and lastly i dont think its possible to expand the map any further but i could be wrong.

Are we playing the same game? Cimmerians aren't there for you?