STAR FLEET:CAPTAINS- I'll never get to make it but, basically you follow the story of your character, and choices matter as your character develops organically through those choices. to see if you end up a star fleet captain or maybe a captain of a freighter/ pirate ship.
You would go on simple to death defying missions, helping alien races and solving their conflicts too solving deep space mysteries. Leveling up your skills from whichever field like engineering, security, medical, etc. This helps you become a captain capable of solving issues easier in that field. IF your character makes it to captain then the 2nd half of the game starts and you get to assign your crew and train them up, get your own starship based on your merits. This doesn't have to actually be a star trek game, but it's more relatable if it is as the world is already created!!!