Supply network is a decentralized system composed from layers of potential suppliers, producers, distributors, retailers and customers etc., where agents are interconnected by material, financial and information flows. These agents have different interests and the whole network behaves ineffective. The expanding importance of supply network coordination presents a challenge to focus more attention on supply network modeling. The game theory approach seems to be a basis for other approaches. Supply network behavior is influenced by a combination of competitive and cooperative relationships between agents. Biform games combine non-cooperative and cooperative approaches of game theory and are promising for modelling behavior of the agents. It may form a global view of the coordination problem. Other approaches to coordination such as auctions and contracts are possible to model as specific game theory models.