Crusader Kings II: Sword of Islam

Key Features:

• Muslim rulers now playable
  
• Updated interface for playable Muslims characters
  
• Unlocks more than 20 features in the game
  
• New counties and titles
  
• Balance Greed vs. Nobility with the new Muslim Dynasty Decadence System
  
• Polygamy. Allow up to four wives for Muslim rulers.
  
• Story events, starting circa the year 100, such as: The Harem, Shia vs. Sunni, Sufi mystics, Dervishes, The Assassins, Sharia, Wife wants to become first wife
  
• Combat Revisions with new Commander traits for more interesting combat tactics