The DCS World Halloween Sale is running from October 22 until November 3 at 15:00 GMT in the DCS E-Shop. Eagle Dynamics (DCS game developer) will also be participating in the Steam Halloween sale, once it begins. Receive 50% off most / many of the module lineup.
If you haven't seen it before, "Digital Combat Simulator (DCS) World is a free-to-play digital battlefield game." The free game comes with two free aircraft: a "Russian Sukhoi Su-25T ground attack aircraft and the famous WWII North American TF-51D fighter." Lots of other aircraft (modules) are available for purchase.. i.e. take advantage of their sales like this Halloween sale! Arguably the top Aviation combat simulator available! Check it out if you haven't done so.
Product page: https://www.digitalcombatsimulator.com/en/news/2021-10-22/
Youtube video: https://www.youtube.com/watch?v=ydynQmkKA5c