New Religious Gameplay: New mechanics for Protestants and Buddhists deepen the religious gameplay. Protestants acquire the ability to create their own national church by gaining religious tradition, whilst Buddhists must maintain balance between high and low karma (high karma ruler becomes detached from the world, while a low karma ruler loses trust of their soldiers).
Devotion: Theocracies have Devotion based on how closely they adhere to their faith, with high Devotion increasing prestige, papal influence and tax income. Theocracies choose their successors from 6 different alternatives, such as an influential preacher or a noble's son.
Subject Interactions: Over 15 new special actions that can be taken towards subjects, such as installing your own dynasty on the thrones of your vassals.
Parliament: Parliamentary rule for constitutional republics and monarchs, and a special parliamentary government for England. Grant your provinces seat in parliament and bribe them to vote on issues that strengthen your nation.
Provincial Improvements: Develop the tax, manpower and goods production of your empire by spending monarch power.