Digital Combat Simulator World (DCS World) 2.5 is a free game digital battle.
The dream of developers is to offer the most authentic and realistic simulation of military aircraft, ground vehicles and ships. 
This free download includes a huge shipping area of the Caucasus and Black Sea region that covers much of Georgia.
It also includes a Russian Sukhoi Su-25T attack aircraft and the famous North American fighter TF-51D from World War II.
The download comes with a very adventurous mission, with the full game on network and more than 156 AI weapon systems, 105 ground vehicles and trains, 50 air defense systems, 19 ships and 84 aircraft. AIs that allow you to design and play very sophisticated missions.
DCS World is massively expandable through additional DCS modules, as well as user-usable plugins and features that can be purchased and downloaded from the official by clicking here.
There are more than two dozen aircraft to buy.
https://www.digitalcombatsimulator.com/en/downloads/world/stable/
