For Color Computer 1,2,3, 16K RAM BASIC, tape or disk. Curtis Boyle's site mentions that it was published by Futurehouse Inc. as part of TRC MAgazine.
The Atari version is listed as being included with volume 1, issue 5 of the MAGTAR newsletter from the Programmer's Institute / FutureHouse.
There may have been an Apple II version, as FutureHouse also produced the appletree in the same range of disk/tape & newsletter publications.
Jim Gerrie has created a version of the game for the TRS-80 MC-10.
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