I like to keep track of my games that I have completed, with most of the games it is pretty easy. When the credits roll, I consider them beat, there are a few exceptions of course like Nier, Resident Evil 2 etc. What I struggle with are fighting, racing games and 4x games. I enjoy these genres, but I don’t know what is “satisfactory” amount that would make me think that I played these games to completion.
Some examples:
- Guilty Gear Strive (or any fighting games that are not Mortal Kombat, injustice or SF6)
- Civilization 6
- Project Cars
For Civ 6, I’d say winning each victory once. Try to do it with different civs each time too. You can set your goal as winning a game on the highest difficulty if you want, but personally I don’t find that to be as interesting as the shift in gameplay necessary to win the different victories without just militarily crushing everyone else.