France Today, agriculture and particularly livestock farming has a strong connection with the question of territorial sustainability. Actually, there are various local stakes concerning the environment quality, the landscape quality, the rural heritage conservation linked to the breeders activities (cultural, knowledge, building). Moreover, in a broader context, those sustainability stakes are linked to the environment quality (GHG emission), the food safety as well as to rural vitality, especially concerning employment and the social aspect of territory. Finally, we must not forget the stakes related to the breeder and his life's quality. These stakes are all participating to the territory and the breeder's sustainability but they are difficult to apprehend because they're all linked. When one of them is threatened, drawback are touching the other stakes, what makes the research of solution a lot harder. It is important to figure out and transmit this complexity to the different actors, through multiple time lines and spatial scales. This understanding will bring exchange and comprehensive easiness. In order to answer this question the best we can, we chose to model the reality through a board game, which articulates three scales: the parcel which brings food to the stock, the farm built as a system drove by the breeder and the territory in its social, economic and environmental dimensions. The model through the game allows the players to take distance from reality and to make it simpler. Moreover, players will understand the breeder's job but also the conceptions of other player's and actors of the territory. In this communication, we will discuss the design of this game which has relied on a specific methodology, based on an iterative logic that feeds on the success and failures we have encounted. We will show how this construction was based on choices and representations that resulted in a compromise between complexity, playfulness and completeness of the system represented, while ensuring respect for the original objectives. The communication will formalize this process, allowing for sharing and debate by comparing it with other types of games and methodologies.