This game software and accompanying website are free to use for lecturers. The game "is a simulated market environment in which up to eight teams each compete in any of four markets, choosing which market(s) to enter, how much production capacity to build, what prices to charge, and how much output to produce. The markets differ in their fixed versus marginal costs of production, sunk entry costs, size, degree of product differentiation, growth rates, and storage characteristics. Each firm knows its own costs in each market and the distribution from which all firms' costs are drawn. The Game is useful for teaching basic economic concepts such as sunk, fixed, and marginal costs, the opportunity cost of investment, firm- and market-elasticities of demand, and product differentiation. It also is immediately applicable to discussions of entry deterrence, first-mover advantages, preemption, competitive advantage, predation, oligopoly coordination, multimarket contact, signalling, information asymmetries, and end game issues in finitely repeated games."