User Summary: Players attempt to deflect a nuclear attack upon the United States using several futuristic anti-ballistic missile systems, also known as the Strategic Defense Initiative. Among the weapon types included are land-based chemical lasers that fire into space and can be deflected by orbiting lasers, space-based lasers, neutral particle beam weapons, and electro-magnetic launchers that fire "smart bullets". From the manual: "DEFCON 5 demonstrates that however powerful or complicated computer programs become, it is, ultimately, the human hand and human mind that decides!"