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.
The MiG-21bis is a delta wing, supersonic, fighter-interceptor jet aircraft. Much like the AK-47 became the everyman's rifle, the MiG-21 has been operated by more than 40 countries worldwide, and has enjoyed the longest production run of any modern jet fighter to date. The MiG-21, in all of its variants, has fought in wars stretching all the way from the Vietnam War in the 1960's to the modern day Syrian Civil War.