In this chaper, we have reviewed and surveyed the literature on supply chain collaboration. As mentioned above, the game theory models that include cooperative behaviour among retailers seem to be a natural framework to model cooperation (collaboration) in supply chains that consist of a supplier and a finite number of retailers. Various researchers in this area have already adopted several cooperative models dealing with supply chain coordination, and it is expected to see many more in the near future since, as you may notice, this is a rather new area of research in supply chain management. One level of supply chain collaboration is the inventory centralization. The main focus of concern here is to examine the effects of horizontal cooperation (cooperation among the retailers only). The first step is to study cooperation in continuous review inventory situations through out the class of inventory games. We can conclude that any collective of retailers can reduce its joint inventory costs by means of cooperative behaviour. Additionally, they can always find stable (core-allocations) and consistent (sustained as pmases) allocation rules, which therefore encourages them not to form sub-coalitions during the cooperative process. This wide class of games arises when considering joint ordeing and holding in the basic inventory situations (EOQ and EPQ). Some nice additons to this umbrella of games are the holding games introduced by Tijs et al (2005), and the collaborative procurement for the EOQ model with multiple items proposed by Hartmand & Dror (2007). There are numerous oportunities to create new inventory centralization models that extend the ones already studied and can be included in the class of inventory games. We hope to see and, why not, do many more in the future. The second step is to consider the dynamic extension of inventory games. It is the periodic version of the above model with finite horizon and time varying demand. Several papers in