Time for me to make a contribution. Here's my favourite little dos game from back in the day. Introducing...
CORNCOB3D !!!!
https://www.youtube.com/watch?v=Pz3ifgF43dAYes, it may look like a really low quality attempt at a flight sim... AT FIRST. However, this little gem is so much more! You can do just about anything in this game. You've got flight instrumentation, red-outs, blackouts, guns, missiles, you can get out of your plane and walk around outside with a pistol and terrorist bomb, you can change planes, REMOTE CONTROL YOUR PLANE, eject with parachute, jump, call for a rescue van, drop bombs, fly through portals... I dunno if I can remember everything but there are several missions you can fly and you can choose which objectives to complete. There's a realistic damage model that affects flight dynamics or you can toggle invincibility for more of an arcade feel. The difficulty varies and you can deploy flaps and throttle! Oh and there's a solid rocket booster on your plane that makes you go really fast!
This game is awesome.
DownloadRun game by doubleclicking dosbox.exe