- A small, self-contained setting.
- Play as the scion of a kingdom.
- Wield your power to influence nations.
- Foil or influence neighboring (player) kingdoms.
- Fewest playable races: human, Elf (Sidhelien), dwarf, halfling, and goblin.
Based on the continent of Cerilia on the world of Aebrynis, in which the players take on the role of the divinely-empowered rulers, with emphasis on the political rulership level of gameplay. The setting revolves around the concept of bloodlines: divine power gained by heroes and passed to their descendants. Characters with a bloodline create an aura of command known as Regency, which is measured in the game using regency points or RP. Using regency, characters acquire a domain composed of provinces and holdings. The development of these domains is as much a part of the game as development of the characters.
The world of Aebrynis has at least four known continents, the frozen continent of Thaele, the continent of Djapar to the southeast, the great southern continent of Aduria, and Cerilia, the location of the actual Birthright campaign. Cerilia itself is divided into five regions: Anuire, Rjurik, Brechtür, Khinasi, and Vosgaard, each named after the primary human group that first settled there.