The first idea of Sa Battalla comes from a group of Sardinian players  who wanted to create a simulation of this important, albeit not very  well known, battle at the time of its 600th anniversary (1409-2009). The game system used is the same as that of "Guelphs and Ghibellines"  published by Europa Simulazioni. In the game, each player takes the role of the Commander-in-chief of  one of the two armies. Each army consists of various "Battaglie", with  each "Battaglia" composed of various units. The players are given the  task of choosing and issuing specific orders for their "Battaglie". The game system emphasizes the progressive deterioration of the  "Battaglie" efficiency during the battle and tries to simulate the entropy  on the field of battle and its effects on the chain of command and the  "victory perception". The game includes rules for historical, alternative  or "free" scenarios.