MadMaze is an online video game designed by Eric Goldberg and developed by Greg Costikyan in 1989.
Gameplay is fairly simple - the game is based around two dimensional mazes, which the player often has to map out in order to progress.
One of the later mazes also featured invisible walls so that the player had to identify whether he was making progress or not by text in the game.
The basic plot of the game was that the player had to fulfill the task of a runner, by venturing into the Mad One's Maze and enlist the help of a wizard at the lowest level.
The player is tasked by Wellan to travel to the center of the MadMaze and recruit the help of a wizard named Moraziel, on the pretext that only with his help can the Mad One be defeated.