I found the closest thing to Letterboxd for video games

The world has largely coalesced around using Goodreads for keeping track of the books you’ve read and Letterboxd for logging the movies you’ve seen, but the answer is a lot less clear for video games. You can leave reviews on Steam, and organize your game library in a way that gives you some sense of what you played when, but it’s not the main feature of what’s ultimately a game launcher and marketplace.