In the upcoming INSULARIS DRACO mod, you can control any of 30 factions vying for control in North-Western Europe, 452AD. Read about the available factions here.
Behold: Insularis Draco! An overhaul submod of the 2014 gem Invasio Barbarorum II: Conquestus Britanniae . 30 playable factions, an immensely detailed map of North-Western Europe, covering the period of 452-700 A.D. when tribal migration, plague, natural.