Before revision: This paper proposes a new equilibrium concept "robust perfect equilibrium" for non-cooperative games with many players . Such an equilibrium is shown to exist and satisfy the important behavioral principles of admissibility, trembling-hand perfection , and ex post  perfection.
After revision: This paper proposes a new equilibrium concept "robust perfect equilibrium" for non-cooperative games with a continuum of players, incorporating three types of perturbations . Such an equilibrium is shown to exist and satisfy the important behavioral principles of admissibility, trembling-hand perfection , and ex post perfection.