Or one can go the Juntland Pro Edition way (Norm Koger)...
Storm Eagle Studios (SES), has rotational sales every day, so you can pick up Juntland or Distant Guns on sale if you keep an eye on them. Today Junland was on sale, still 12hrs left.
SES uses the "Stormpowered" app (similar to Steam), but you can play offline.
You do need to spend some time with it as it´s on the hardcore side but it´s great, you have a editor, multiplayer ect. Demo available too.
YT video gameplay:
Win10(x64), i5 3570k @ 3.4Ghz, 16GB ram, Zotac GTX 1060 6GB, Logitech G13, G502, TM Warthog HOTAS, CH Pro pedals, TrackIR 5.0, Corsair Void Pro 7.1 USB.