Players starting earlier will have to wait for 1453 to begin with regular tech progression as technology during CK2 era does not change much.
Crusader Kings II with optional expansions, latest version is required.1.3.6 Buildings, Development and Wonders.1.3.5 Diplomacy, Vassals, Tributaries and Personal Unions.1.3.4 Advisors, Rulers, Queens and Heirs.
