It is in the category of turn-based multiplayer - to be honest it's not even a proper multi-player game. Other players come along and raid your coffers, nick your paintings and run off with your chickens, but its not really real-time, and the only time you see them is if you request a video of them performing a 5 finger discount on your items...
The main quest bosses are AI controlled.
You do need a continual internet connection for this though.
Edited by deleted (Mon 03-Mar-14 16:28:40)