I'm an early-internet player, but I used to really enjoy games like KingsOfChaos, Outwar, Neopets and Runescape (OG version, or 2007 reboot). It sounds weird,

I'm an early-internet player, but I used to really enjoy games like KingsOfChaos, Outwar, Neopets and Runescape (OG version, or 2007 reboot). It sounds weird, and not what most people would consider as "gaming" but all of those were a mix of solo & coop since they had a social aspect but totally playable alone (well, KingsOfChaos would be kind of silly to play alone). It seems like only the OG runescape still has some sort of following, the other ones died out (there was a different one with space ships and planets and power levels, but I forget the name - same principle as Outwar and KingsOfChaos). There was also a Russian one based on the Dozory universe (Night Watch) by Sergey Lukianenko (one of my favorite authors), but that mostly turned into a cash grab which is a bummer because it's one of the coolest game concepts out there - it has been my dream that someone actually makes that game.