You know, I don't think I've ever done this before. I had to think hard on this one and I'm coming up empty. I got all the collectibles in Shadow of Mordor because I'm a sucker for anything related to LotR lore. But I think there was some other side content I just didn't bother with.

I also came close with Horizon Zero Dawn and Spiderman PS4, but again, there were annoying fetch quests or some other things that I just didn't want to do.

I don't think I've ever played a game where I want to do every side mission or collectible. I'm by no means a casual gamer--its the predominant thing I choose to do in my freetime. And while I have a long list of games that I love, there's always something I can't be bothered with in a game.