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Magus and Questor are trapped in the 15 mazes of Xor. These include Dolly's Revenge, Patience Pending and The Decoder, and can be played in any order. Before going through the exit, they must collect every balloon from within the levels. All of this must be done in a limit of 2000 moves.

The characters have differing abilities, and can be swapped between at any time. Hazards to avoid include bombs, falling boulders and barriers. Four pieces of the map can be found and collected.

The physical rules of this top-down maze are somewhat bizarre, but consistent: dotted force-fields can be traversed (and neutralized) by horizontal passage, waved ones by vertical passage; fish will fall as surely and as lethally as the boulders in Boulderdash, while chickens will travel in the direction they are pointed until something gets in their way. Various explosive devices, dolls and even teleporters further contribute to the complication of moving around this maze. Should all its levels be successfully completed, information will be provided permitting the completion of the overarching meta-puzzle.


There are no BBC Micro user screenshots for this game.

There are 47 other screenshots from other versions of this game or official promotional screenshots.

Promo Images

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Alternate Titles

  • "Xor - The Ultimate Maze Challenge" -- Tag-lined title

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User Reviews

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Critic Reviews

Computer Gamer Feb, 1987 85 out of 100 85
Computer and Video Games (CVG) Jun, 1987 8 out of 10 80


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Order of XOR

If you solved all 15 levels and an encrypted anagram then you could join the Order of XOR where you received a certificate and a badge.


In addition to the ports here listed and the already-present-in-Mobygames conversions Prospector in the Mines of Xor for Amiga and Ovine By Design's 2004 Windows port, this game has enjoyed a number of unauthorized homebrew conversions such as a Javascript version by Rob Veldhuyzen van Zanten (see Links/Searches), one for the Game Boy Advance by Mick Waites, and releases named !XOR for RISC OS and the VR3 PDA by John Hedley.


  • ACE
    • October 1988 (issue #13) - Included in the Top-100 list of 1987/1988 (editorial staff selection)

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Kabushi (257496) added Xor (BBC Micro) on Jan 24, 2012
Other platforms contributed by Martin Smith (76472) and Jack Lightbeard (2706)