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Orbiter Combat Addons provides a set of addons--spacecraft and utility plugins--to enable the use of Dr. Martin Schweiger's Orbiter space flight simulator to simulate potential space combat systems.
You can download file releases of Orbiter Combat Addons project from List of release files
System RequirementsOperating System: All 32-bit MS Windows (95/98/NT/2000/XP)
List of release files