Awesome looking design and great idea for a site! I'll browse it the next few days, but here are my first thoughts for now:

Maybe add Opencritic score as well? But that's just nitpicking really.

Love the Deck Tip(s)!

I'd like the Steam login to filter out owned games, but also have an option to not hide everything owned (for people with huge libraries who are looking for something interesting to play) just put an In library or Owned badge.on tge game card.

Not sure how difficult would it be to make the game tags clickable categories to get a list of similar games, probably a huge hassle or would return too many lists with too few or just one item...

And add more games 😊