Our Scripts Vault contains many game scripts that you can use to create your own game!
The bigger problem at the moment is simply creating the game.
If you make an TBS, make it so that the lowest population side will have a hand up on the resource buying, and that the higher up side will have lesser rates.
you can implement some sort of gods who will bless sided which have fewer men and give them some bonuses to help them against others. So less man on each side compared to other two, more gain you get because your men has plenty of courage and so...its all story