Prehistory mode: Based a bit on Humankind where you are starting as nomadic society with 3 special units. They can scout, gather resources, hunt etc. After 10 turns when you advence to Ancient Era you are choosing one unit to settle your first city when the rest is becoming Scouts. The city gains additional temporary bonus based on points received by this unit while being gatherer or hunter. Having larger part of map discovered and having 3 potencial starting positions, you are able to select fine position as well.