After Sword of Islam, Crusader Kings II is now experiencing the Legacy of Rome expansion, where players will deal with the aftermath of the Roman Empire, none other than the Byzantine, the Holy Roman Empire.with the
The new expansion features Leader Focus, which will make the player's generals more important. However, with great generals comes new treachery, as competent generals may decide the player is better off at the bottom of a lake. Players will also now be able to appoint their own Orthodox patriarch instead of depending on the patriarch in Constantinople.
The other major addition is the new Faction System, in which gamers can join a royal faction, using their allies in the party to enhance their strength - but they will also have to deal with Factional Revolts, with the possibility of disgruntled vassals will revolt through their faction instead of being easily put down like dogs.
Players can also raise standing armies using retinues; the size of which is determined by technology. Players will also now be able to raise a single, larger levy from their direct vassal, with no attention paid to what the lower vassals think.
Crusader Kings II: Legacy of Rome will cost $9.99 USD and will launch sometime in Q4 2012.