Oof, just on PC, I’m collecting free games faster than I can play them. In between Epic’s weekly offerings and regular giveaways on GOG, Steam, developer/publishers and via third parties like Amazon Prime… (and now even Netflix is giving out phone versions of PC games I had on my wishlist).
I try to mix up older and newer games from my backlog (I consider all games I own to be part of my backlog, no matter how recently I got them). Plus, I often have multiple unplayed games from a series, so I usually play them in chronological order. I feel guilty if I don’t at least make an effort to play through the older part of my backlog - the problem with that being it makes it more likely that new games I pick up will sit unplayed until there’s a remake or remaster…