[FG28_Kodiak]

The Iron Cross Edition costs $19.99 (~€14,50) for 9 planes:
SPAD XIII, Fokker D.VII, Nieuport N.28, Albatros D.Va, Fokker DR. 1, Pfalz D.IIIa, S.E.5a, Sopwith Camel and Nieuport 17 (Bonus Plane).

http://riseofflight.com/en/store/dem...demoiceupgrade