I recently played an amazing DOS game where you have your country and you can declare war or peace with other ones, and i really enjoyed it. Growing up one of my favorite DOS games was Gobliiins 3, such cool memories!
I cannot remember the name but you got to choose between a boy character and a girl character and each stage you had to get all the collectibles to open the door. It was a 2d platformer as well.
Edit: Turns out the game is called Word Rescue.Star Control II for sure. Fantastic game, still one of the best story-based games I’ve played. Heavily inspired a lot of more modern franchises, too, including Mass Effect.
Dune II: The Building of a Dynasty, but I’ll give Wolfenstein 3D an honorable mention.
Wing Commander Privateer - I love a good economy game in my spaceship game.
Mechwarrior - Battletech 1st person. Get you a 30 foot tall robot and shoot some lasers at other giant robots. Go for the knees.
Space Hulk would definitely be mine
Wing Commander 2. My Dad sourced it and the manual was a B&W photocopy. It took ages to get onto it sometimes as the photocopy was so bad I’d be unable to decipher what letter 6 on line 8 of page 10 was.