Features of Europa Universalis IV: Emperor include:
A Powerful Pope: Appoint cardinals, publish Papal Bulls and gather tithes. The Vatican and Papal Controller now have new abilities to sway the souls of Christendom.
New Holy Roman Empire Systems: Imperial Incidents provide new challenges to the Emperor's power and authority. Will your empire follow a course to a centralized monarchy or decentralized federation?.
Revolutions Revamped: The spirit of Revolution is a contagion that must be either embraced or vigorously opposed. Use the guillotine and revolutionary guard to enforce the new way of thinking.
The Hussite Faith: Bohemia has an early game chance to embrace heresy and stand alone against the Pope until The Reformation.
Hegemonies: If you accomplish great feats, you should expect great rewards. Seize the mantle of honor for accumulating great wealth and armies.
New Missions: Over 20 new unique mission trees for a variety of European nations
Defender of Faith: With great responsibility comes great power. Earn more bonuses for defending a major religion than for defending a small one.
The Council of Trent and Counter-Reformation: Join other Catholic rulers to slow down the spread of the Reformation by making concessions to the unruly mob or harshly imposing the will of God.
Provoke Rebellions: Risk a larger rebellion now while you think you can manage it instead of waiting for discontent to take its course.
Emperor will be accompanied by a major update free for all Europa Universalis IV players, that includes a redrawn map of west and central Europe, Crown Lands, new ideas and a host of other major changes.