In Defcon 5, space aliens attack colony MRP-6F and turn a once peaceful evening of engineering into a battle for survival. As the cyberneer assigned to install a perimeter defense system into the colony, you must work your way from level to level, blasting away little green men while uploading safeguard software and activating the necessary switches to power up the program. Only by locating all objectives and items can you successfully complete this task. ~ Gracie Leach, All Game Guide