I play a lot of windowed games on my PC as I watch less engaging content like TV I’ve seen, Youtube. Lately Balatro, Peglin, a racing game called art of rally, Mini Motorways. Interested to hear other people’s preferences.
I generally want something that runs well windowed because I use a third of my ultrawide to run the video, so no shooters or “big” games usually.
Binding of Isaac, Brotato, or Balatro are good once you have enough experience with them to be able to play without much thought