I went to Midjourney and gave it the following prompt: "character from [name] MMORPG //photorealistic --ar 2:4", where [name] is the name of a past or present virtual world.
Here's an alphabetical list of the virtual worlds I did it for:
Albion Online, Age of Conan, ArcheAge, Black Desert Online, Blade & Soul, City of Heroes, Crowfall, Dark Age of Camelot, Dungeons & Dragons Online, Elite Dangerous, EverQuest, EverQuest 2, Elder Scrolls Online, EVE Online, Final Fantasy XIV, Guild Wars 2, Lineage 2, Lost Ark, Lord of the Rings Online, Meridian 59, Maple Story, MUD, New World, Old School Runescape, Rift, Runescape 3, Second Life, Star Citizen, Star Trek Online, Star Wars Galaxies, Star Wars the Old Republic, TERA, The Secret World, Ultima Online, Wildstar, Word of Warcraft.
See if you can match the virtual world to the image.
Points to note: MidJourney doesn't seem to have much data on some of these; there's a huge preponderance of white, female characters; for MUD and Second Life, I put "virtual world" rather than "MMORPG".
Answers sometime in the future, once you've had a chance to make your guesses.