Achievements at 100%, Not Shown In Finished

[BSwordsman]

So I completed the game entirely with all achievements, and it is not showing in my completed games. Anyone know how to fix this?

[FloReBi]

Steam restricts games that aren't played often, for example, and must have a certain number of players or something similar. If you look at the game's shop page, you'll see the item "Profile functions restricted" at the bottom right.
You can therefore only see the game yourself and it won't be included in your total. This can change if the game meets the requirements and Steam lifts the restriction.
If you want to see all of your 100% games at a glance, I recommend Exophase, for example, where everything is shown to you.