I have noticed some odd gaps. One being Home Inventory software. Multiple great options for Windows and Mac. Linux options are basically self host a web app or do the same thing with a spreadsheet. I went with a spreadsheet because I just don’t have that much stuff. An example of what kind of app I’m talking about: https://binaryformations.com/products/home-inventory/. Source: over 2 years ago

I use Backloggery which is more aimed towards playing the games you have and clearing your backlog. Source: about 1 year ago

I havent used all these, so your milage may vary, but I was looking for a similar thing not long ago. Https://www.backloggd.com Https://rawg.io Https://wetheplayers.com Https://www.grouvee.com/ Https://gamelib.app/explore Https://backloggery.com/ Https://playnite.link/ There's also just using a spreadsheet, or Notion with a good template. Source: about 1 year ago

There are websites like howlongtobeat.com or backloggery.com that let you track individual game status. You can write down ratings or when you started/finished a game and it tracks that. I've used backloggery.com for 10+ years so it was really easy to grab the dates I played Trails with it. Source: about 1 year ago

For game tracking, try The Backloggery! Source: over 1 year ago

People often use sites like HowLongToBeat, Backloggery, or Backloggd. Source: over 1 year ago