I located a file containing the player documentation for Legends of Future Past, a game my wife and I published in 1992. Around 1992-1993, I believe it may have been the first commercial “MUD” type game on the Internet (it got its start on the Tymnet and CompuServe networks). On Tymnet or CompuServe, it cost $6/hour; and on the Internet, an “affordable” $1.80/hour — in either case, quite a difference from the $15/month fees of today.
This version of the documentation dates to 1994, which is probably when we created a Web-based version of the game documentation. When the game originally launched in 1992, the documentation would have been a straight-text file (none of our users were using Web browsers at the time, and access to the game was via telnet and/or dial-up, BBS-style modem telecommunications).
This gives a glimpse into the dawn of massively multiplayer online games.