This is the Great Planes RealFlight G3 Expansion Pack 1. Expansion Pack 1 is compatible with RealFlight Generation 3, 3.5 or 4 FEATURES: Adds thirteen new planes including several flat foamies, four helicopters and one flying lawnmower Four new incredibly realistic flying fields, three with PhotoField technology that creates the highest resolution ever offered from Great Planes RealFlight Fixed Wing Aircraft ElectriFly FlatOuts Reflection ElectriFly FlatOuts Turmoil ElectriFly FlatOuts Flatana ElectriFly FlatOuts Matt Chapman CAP 580 Great Planes 1/3 Scale Matt Chapman CAP 580 Pietenpol Air Camper BooRay Racer F5D Pylon Racer Hotliner ElectriFly Yak 55 EP Great Planes U-Can-Do 3D Nieuport 28 X-29 Flying Lawnmower Helicopters Heli-Max MX400 Miniature Aircraft Ion-X Bergen R/C Intrepid 90 Bergen R/C Intrepid Gasser EB Flying Fields PhotoField Practice Field PhotoField Athletic Club-Ideal for indoor models and small electrics PhotoField USAF Museum Field-Replicates a famous military flying site 3-D Obstacle Course 2-For testing piloting skills in a realistic 3-D environment INCLUDES: Great Planes RealFlight G3 Expansion Pack 1 Disc REQUIRES: Great Planes RealFlight G3, G3.5 or G4