Great Planes RealFlight 6.5 Upgrade for G4 and Above FEATURES: Choose from over 95 aircraft and more than 30 flying sites INCLUDES: Great Planes RealFlight 6.5 Upgrade Disc ***RealFlight 6.5 Upgrade does not include the Airplane or Helicopter Mega Pack REQUIRES: Windows XP, Vista, 7, or 8 Local administrator access required Intel Pentium 1.0GHz or equivalent 512 MB RAM 7 GB Hard Drive Space DVD Drive