I’ve been thinking about organising my growing library a bit, mostly to mark games I consider as completed.

But also to mark games I played but lost interest in, or games I’ve finished together with my kids instead of myself alone.

I started doing that in Steam but as I added games via GOG or Epic Games store, or emulators, Steam and would lose their tags (or rather their belonging to a collection) as soon as I uninstalled them.

Also if as a bonus the system could suggest new games based on what I finished or maybe based on ratings I give, that would be nice but not necessary.

Is there any straightforward solution to use? Either general something device-independent or specifically on the Steamdeck locally. Can also selfhost software if there is anything good.

How are you all doing that?