A VIC-20 version was published in the Commodore Computing International Vol 1 No 11 (Mar 1983) Home Computing supplement, Pages 6-19.
The C64 version was published in the book CBM 64 programs - Volume 1, Duckworth Home Computing, 1984, pp. 169–189. A version for Commodore PET also exists.
The game was also ported to the TI-99/4A by Barry T Boland and to the TRS-80 by an unknown author.
[+] Users who have solved this game
[+] Users currently playing this game