What is "madmaze"

MadMaze is an online video game designed by Eric Goldberg and developed by Greg Costikyan in 1989. It was the first online game to draw over a million players., and was playable through the Prodigy service. The game disappeared in 1999 with the death of the Prodigy service, but with the permission from the service and the creators, fans of the game have rehosted it.