A game‐theoretic analysis of terrorism examines interactions between a terrorist organization and multiple target countries. It considers both preemption and deterrence as counter‐terrorist policies. Damage from terror includes material costs and resultant fear. Fear effects lead to different equilibria and implications for counter‐terrorism policies. The model identifies conditions under which greater preemption may be the rational response to an increase in terrorism, that is, it analyzes the merit of the dictum “offense is the best defense.” It also examines the characteristics of cooperative behavior among target countries in dealing with the threat of terrorism. (JEL C72, D74, F52, F53, H41)