I think a lot of the arcade games from the 80s and also Commodore 64 games hold up very well. They had little computing power to work with and therefore few opportunities to wow with graphics. So they had to design playable games.
On the Commodore 64 I’d venture to say I’m the best Dino Eggs player in the world. I’ve been playing it since I was 12 or so, and still do. Using an emulator, it can be played for free, offline, and without hassle. It’s still challenging, unforgiving and I can play while listening to podcasts.