I did this to test out my strategy gaming coding skills. Instructions: There is no AI, instead, you drag the units around and fight. This means you can play with up to 8 players! To fight, press space when 2 units are touching. To take land, go onto the city and press q. To build units, press q, they will spawn at your king.
This takes place in 1224 after the Byzantine Empire was destroyed by the Venetians and Crusaders. The Latin empire was their crusader state, but it is being torn apart by Nicea, who was trying to reform the Byzantine empire, and Epirus, who wanted a Greek kingdom.