As an efficient approach, the trust policy is implemented to defend against insider attacks in complex networks. However, the
imperfection of trust relationships directly hinders the effort to quantitatively calculate trust value, especially in choosing a
cooperative partner. Fortunately, the game theory is gradually concerned with addressing the above issue to further enhance
security. In this paper, the game theory and the trust policy are reviewed briefly. +en, the research roadmap on game-based trust
in complex networks is discussed and analysed deeply. Furthermore, some research directions in the near future are given. It is
worth mentioning that our contributions not only describe the evolution of the game-based trust clearly but also suggest the trust
mechanism based on the bounded rational game more suitable to uncertain information.
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