Commenting so I can come back to this later with the site, I can’t recall the name at the moment
Alrighty, it looks like the list has grown and I can’t remember what site I had used previously, so here are a couple options. It looks like they all roughly have the same format of: create account, fill out games from database, possibly account and app linking options.
In no particular order:
How long to beat: create an account, has a games library for your profile
Keep track of my games: create an account, “pay what you want”-ware (free), can import gaming accounts (Steam PSN etc) to fill out list.
Backloggd: Create an account, can fill out games to your library and has space for reviews and other user profiles
Grouvee: Create an accout - homepage is pretty minimal
Gametracker: Seems more “game team” oriented but it has a spot for filling out a games library
GameTrack: Has an IOS app as well, can link gaming accounts for achievements, can make lists to sort games
Playtracker: Create an account, looks like there is a software download for the computer
Stash: Has both Android and IOS apps,
Of all of these, the feature sets look basically the same, the main differences seem to be UI layouts and more niche options of sorting/filling out. All of them look to need an account (expected). Since I can’t recall which, if any of these, I had used in the past I will just say that the websites for Playtracker, Backloggd, and How Long To Beat looked the “best”.
Hopefully this helped and didn’t just give you more choice anxiety, lol.