Crusader Kings II - PC & Mac (Steam)

Key features:

• Start a game at any point between 1066 and 1337 and play until 1453
  
• Pick a Christian lord and make sure his dynasty survives as you play a succession of his descendants through the ages
  
• Gain Prestige for every successive character you play, furthering the glory of your Dynasty
  
• Expand your feudal domain - and keep it from falling apart
  
• Unravel the plots of your courtiers and vassals, each with their own opinions and agendas
  
• Take up the Cross and fight the Moor, the Heathen and the Heretic.
  
• Defend against the onslaught of the Mongol Horde
  
• Struggle with the Pope for control of the bishops
  
• Relive the Middle Ages with up to 32 other players in a competitive multiplayer mode