Great Planes RealFlight G4 and Above Pack 6 Expansion FEATURES: Access to 24 flying sites and 70 aircraft choices originally included On RF Add-Ons volumes 1-5 Adds 18 new aircraft, 3 new flying sites INCLUDES: Airplanes; Helicopters; Photo Field Sites REQUIRES: Minimum System Requirements; Real flight Generation 4 (or above) 500 MB hard drive space Intel Pentium 1.0GHz or equivalent