Play with your full tech tree, keeping your civ bonuses and unique technologies. May lead to overpowered combinations.
Exception: 1. Saracens do not receive Guilds, otherwise their market trade fee would be increased to 15%.
2. Persian UT Mahouts affects Battle Elephants also.
3. Aztec miitary speed creation affects cavalry also.
4. Buttons to create Slingers, Huskals and Tarkans at Archery Rangers/Barracks/Stables changed due to overlap.