This is the Great Planes RealFlight G3 Expansion Pack 2. Expansion Pack 2 is compatible only with RealFlight Generation 3 software. FEATURES: Adds fourteen new planes including several Great Planes and ElectriFly models plus unique designs such as the quad powered Wolf Spyder, also four new helis from Thunder Tiger, CarbonXtreme, and Miniature Aircraft Two new 3D flying sites, an ancient Aqueduct, Obstacle Course 3, and a new high-resolution Photofield inside the E-Fest Arena