Mind Walker is a 1986 computer game by the late Bill Williams. It was published by Commodore and is often cited as the first commercial title for the new Amiga 1000 computer, though there are other contenders. The game is perhaps best known for its unusual gameplay and concept. The game has also been chosen by Amiga, Inc. as one of the first six games to be made available to download from their own site using their "Classic Amiga Game Player" to enable users to play the game on a Windows PC.
The game's story is vaguely reminiscent of the 1966 Twentieth Century Fox film Fantastic Voyage. The player is immersed inside a human brain and must cure a psychosis that is threatening patient's well-being. Many aspects of the game (including enemies and power-ups) play on this psychological theme. The four player avatars, for instance, are the human bodybuilder, the sultry water nymph, the mysterious wizard, and the alien spriggan.
Only one version of Mind Walker was ever released for the Amiga. Nevertheless, this single version continued to run without problem across four generations of operating system, three generations of CPU, and at least three generations of platform hardware, spanning over six years, starting on Amiga 1000. Given that the program was written before production hardware was available, it was an astonishing accomplishment, and was easily among the most forward-compatible software products ever released for the Amiga.