Since 2012, Arthur O'Dwyer has had an updating web page called The Search for LONG0751 about a lost version of Adventure that was playable on Compuserve. It has long been one of the top early "missing" games.
It is now found and playable:
https://quuxplusone.github.io/blog/2025/12/29/long0751/
#retrogaming #retrocomputing #adventuergame #videogames #textadventure #history