The Imperium Romanum: Emperor Expansion enables the player to travel through the ancient world, starting in Great Britain, passing through the wilds of Germania all the way to the fertile banks of the Nile in ancient Egypt. 16 challenging missions are divided into four campaigns which take place at well known historical sites such as Aque Sulis (Bath), Hadrian's Wall, Massilis (Marseilles) or Treverorum (Trier). The Imperium Romanum: Emperor Expansion demands strategic and economic skills from the player if they are to become a successful governor. The Emperor Expansion also requires the player to factor in the effects of religion and the all important Roman gods. Additionally, the Add-On provides new and bigger maps, newly designed buildings, new tasks, and extended voice recordings.