Ported to the Amstrad CPC by Carsten Dost (SRS).
Jim Gerrie has created a version of the game for the TRS-80 MC-10.
Ben Grimer translated the original game to C++ in 2012; see here.
Ben's C++ version was translated to C by retroprogrammez.fr in 2023.
[+] Users currently playing this game
A map (walkthrough) can be found at:
http://jimgerrie.blogspot.ca/2014/04/tim-hartnells-chateau-gaillard.html
A dismal BASIC type-in from 1983, from one of the too many Hartnell's books (frankly, par for the level of the author's other coding efforts). As usual, it's buggy and poorly designed, and the ready typed versions that can be found online make it totally broken through typos. I have uploaded a fixed version for PC, which mends some issues in a different way from the Atari one, just for variety.