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: Combined Arms gives you control of ground forces during the battle. Use the Command Map to move ground forces, set artillery fire missions, and control the ground battle. Assume the role of a Joint Terminal Attack Controller (JTAC) in multiplayer and designate targets for player-controlled close air support aircraft, or directly control armor vehicles or air defense weapons and engage the enemy.