Join our Discord to chat with fellow friendly gamers and our knowledgeable contributors!

Not an American user?


Early (1983) TRS-80 BASIC text adventure game, the middle in a forgotten trilogy (sandwiched between "Project Triad" and "Codename Intrepid"), remembered for its no-holds-barred approach to math and logic concepts informing game settings and puzzles: in one section, sparking a genre cliche, one has to play a text adventure game inside the text adventure game; in another, one falls asleep and in a dream constructs a proof utilising physical representations of various components of symbolic logic; additional game areas are accessed by pushing and popping the stack, objects extruded from 2 to 3 dimensions by _y_ing them.

The supporting documentation understates when it claims the scenario for the adventure is meant to be vague -- searching for a 12-word code phrase (unlocked in chunks upon completion of certain puzzles) is just an excuse for sending an unwary player through an alien and abstract setting two words at a time (using VERB NOUN gameplay with a vocabulary of about 200).

Later (1988) versions of this game were ported in C to Solaris, Atari ST and MS-DOS environments; more recently, in December 2003, Andrew Plotkin ported it to the interactive fiction standard of machine-independent Z-code.


Beyond the Tesseract Atari ST Start screen
Beyond the Tesseract Atari ST Starting location and some typically mind-boggling navigational options
Beyond the Tesseract Atari ST Introduction

Promo Images

There are no promo images for this game

Part of the Following Group

User Reviews

There are no reviews for this game.

Critic Reviews

There are no critic reviews for this game.


There are currently no topics for this game.



How many games include a recommended reading list? In the game documentation, David Lo states The following books and reference works were used at one time or another as a source of information and/or inspiration:
  • The Beauty of Fractals.
  • The Fontana Dictionary of Modern Thought.
  • The Fractal Geometry of Nature.
  • Godel, Escher, Bach: An Eternal Golden Braid.
  • The Heritage Illustrated Dictionary Of the English Language.
  • Mathematics: The New Golden Age.
  • The New Lexicon Webster's Dictionary, Encyclopedic Edition.
  • The Penguin Dictionary of Science, Fifth Edition.
  • Roget's International Thesaurus.
  • The Science of Fractal Images.
  • The VNR Concise Encyclopedia of Mathematics.
  • The World of M.C. Escher.

Related Web Sites

Pseudo_Intellectual (61506) added Beyond the Tesseract (Atari ST) on Dec 25, 2004
Other platforms contributed by Pseudo_Intellectual (61506)