Simulacron-3 is a story about a Counterfeit World or a VR World (VRW) with Digital Player_Characters and some Non-Player_Characters. It's a fantastic VR Sci-Fi simulation story from the 1960s. How advanced, convincing or realistic could various simulations get after 50 or 100 years or especially 1000 years of development?
https://en.wikipedia.org/wiki/Life_simulation_game#Social_simulation
https://en.wikipedia.org/wiki/Virtual_reality#20th_century
https://www.businessinsider.com/guides/tech/npc-meaning
https://newzoo.com/resources/rankings/top-20-pc-games
https://help.wolfy.net/en/article/inactivity-in-game-1af3a50
