Often, it’s not really the “old games” but the “not the marketed shit”. One of my favourite gems is Outward. It looks and feels a bit clunky, but you breathe love and passion for making games on every corner.

Definitely try solo stuff with plugy. I installed D2 for a nice bnet session of baalruns but bnet was a bit riddled fuckhole. I tried plugy before uninstalling and it got me hooked on solo play for 3 more years.