Digital Combat Simulator World (DCS World) is a free-to-play digital battlefield game, focusing on simulation of military aircraft. It includes the FREE Su-25T and TF-51D aircraft and it is extensible through additional DCS modules as well as user-made add-ons and mods.
DCS World includes a vast mission area of the Caucasus region that encompasses much of Georgia - the location of the Russian invasion of Georgia in 2008.
DCS: Flaming Cliffs 3 (FC3) is the next evolution of the Flaming Cliffs series. FC3 features the F-15C, A-10A, Su-27, Su-33, MiG-29A, MiG-29S, Su-25T, and Su-25. FC3 aircraft provide an easy learning curve for new players and focuses on a broad range of aircraft rather than a detailed single aircraft.