product differentiation and game theory

in different phases of industry life cycle, we need to use different startegies. can we use product differentiation strategy in growth phase and game theory for mature phase? then which strategy we should use for pioneer phase and decline phase?

game theory isnt a strategy, its more of a negociation/behavior preidiction school of thought i can imagine in pioneer you want any of the three: cost, diff, focus to be able to last in the industry, same as decline