Old games/activities you miss and 懐かしいこと

I remember when I was around 12 or 13 I used to play games by this company called Artix Entertainment. They basically made browser rpg games and I used to play this game called AdventureQuest Worlds. It was so fun just to mess around with a bunch of friends and even though we all sucked and our equipment was shit it was extremely exhilarating to all be together and try to kill a boss or something. I've gotten back on in the 6 or 7 years since then. While I still loved the simple rpg elements of it, and even botted to get to high levels and the best equipment, I realized it had become extremely boring since I had no one to play with anymore.

So what are old games or activities that you miss doing and feel 懐かしい (things you miss, reminisce about).

Also artix entertainment had this game called MechQuest and I used to be so into it but looks like it's been dead for many years RIP.