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
You’re right, achievements are excessive in some games, that’s why I don’t rely on them too much. I like the idea of short term goals though, and if those goals seem “fulfilling” then I can use them as my completion milestones.