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 Nevada Test and Training Range (NTTR) has the largest contiguous air and ground space available for peacetime military operations in the free world. The NTTR land area includes simulated air defense systems, mock airbases, and several target ranges. The NTTR was also used for nuclear testing. Today, it is home to RED FLAG and other military exercises that include countries from around the world. The NTTR map for DCS World 2 includes Nellis AFB, Creech AFB and the infamous Groom Lake AFB (aka Area 51).