3D Monster Maze

The game uses an 18-by-16 cell maze which is randomly generated.{{cite web|url=http://softtangouk.wixsite.com/soft-tango-uk/3d-monster-maze|title=soft-tango-uk|website=wixsite.com|access-date=21 April 2018}}{{cite magazine| archive-url=https://web.archive.org/web/20070513045033/http://www.edge-online.co.uk/archives/2006/04/the_making_of_3_1.php| archive-date=2007-05-13 | url=http://www.edge-online.co.uk/archives/2006/04/the_making_of_3_1.php | author=Edge staff (Andy Krouwel)|title=The Making of... 3D Monster Maze|issue=161| magazine=Edge| date=2006-04-18}}{{cite journal| title=Letters| journal=Sinclair User| date=May 1983|author=Malcolm Evans| issue=14|url=http://www.sincuser.f9.co.uk/014/letters.htm| url-status=dead| archive-url=https://web.archive.org/web/20080622191009/http://www.sincuser.f9.co.uk/014/letters.htm|archive-date=2008-06-22}} Reply from Malcolm Evans describing maze generation. Initially the T. rex lies in wait. Once the player starts moving, the beast begins hunting. Thereafter, the T. rex may either calm down (if the player goes into a part of the maze that is far enough away), or become more active as the player comes closer. If the T. rex gets a direct view of its prey, the monster will run directly at the player.

The T. rex anxiety level, reported to the player as a statement in the status line, provides an indirect clue to the player's relative distance from the monster. These statements are: REX LIES IN WAIT, followed by HE IS HUNTING FOR YOU, FOOTSTEPS APPROACHING, REX HAS SEEN YOU, and RUN HE IS BESIDE YOU or RUN HE IS BEHIND YOU. The player's speed is greater than the monster's, thus it is possible to escape by running (unless the player is trapped in a dead end).{{cite web | title=3D Monster Maze Instructions| url=http://www.zx81stuff.org.uk/zx81/info.php?path=/zx81&sub=inlays&root=3DMonsterMaze&file=.Instructions.jpg| year=1981| access-date=2008-06-12}} Scan of 3D Monster Maze instructions. The player can manually map the maze on a piece of paper with each step, but this becomes increasingly difficult as the pace increases. The fast pace can also lead to hard keyboard presses, which, in turn, can shake the computer/16K memory expansion connection, and lead to a sudden reset with several minutes worth reload time.{{cite news | title=Sinclair ZX80, ZX81 and Spectrum| url=https://www.bbc.co.uk/dna/h2g2/A82162| date=1999-06-01| access-date=2008-06-12}} A look at Sir Clive Sinclair's computers.

Points are awarded for each step made by the player any time the dinosaur is on an active hunt. Since the player runs faster than the monster, it is possible to accumulate points by running around in circles with the monster just a few steps behind. Points are also given upon successfully getting away through an exit and into another maze.{{cite journal | title=Home Computer Games: Four Great Games For The Timex Sinclair 1000| journal=Creative Computing Video & Arcade Games| date=Fall 1983| author=David Grosjean| volume=1|issue=2| url=http://www.atarimagazines.com/cva/v1n2/timexgames.php|archive-url = https://web.archive.org/web/20110628230759/http://www.atarimagazines.com/cva/v1n2/timexgames.php |archive-date = June 28, 2011|url-status=dead}}

When the game ends, the player is informed about being "sentenced to roam the maze forever", and then can either "appeal" or continue playing again in the last maze. If the appeal is attempted, it is rejected with 50% probability, in which case the player is sent back to roam the previous maze again. An appeal which is accepted effectively results in the computer self-reset via BASIC's NEW statement.

File:ZX81.chars.00-0A.80-8A.png characters used as the building blocks of the 3D picture.]]

The graphical view, animated in real time at around 6 frames per second, is composed of 8×8 pixel black-and-white characters, so the view is roughly square, taking a 25×24 area on the 32×24 text screen. Sub-character resolution of the ZX81 pseudo-graphics character set makes the resolution doubled in each dimension (making the view consist of 50×48 "larger pixels"). Using the 6 pseudo-graphics with a dithering pattern also made it possible for the game author to incorporate a third colour (grey) in the black-and-white picture. Part of the screen is reserved for the score count, and a one-line status message is occasionally overlaid at the bottom of the graphical view. The player always runs along the corridor's centreline, and looks in the current direction only, which simplifies the rendering task.

File:3D-monster-maze-T-rex-2-steps-away.png, is two steps away.]]

The game's 3D engine and the random maze creation code is written in Z80 machine code, produced with an assembler. This is augmented by several dozen BASIC lines for less critical tasks, such as the initial greetings and the game legend animation inter-line delay. The machine code subroutines block is embedded into the BASIC line 0, beginning with a REM (BASIC comment) statement, making the interpreter step over it. If, by accident, one tries to edit the line via the BASIC line editor, the changes will not be accepted since 0 is an invalid line number. Such code is typically created by first creating a line with a valid number, and then modifying the number field in the BASIC program area using direct memory manipulation, such as POKE.{{cite web | title=A Guide To POKEing on the Sinclair ZX Spectrum| url=http://www.neoncherry.com/retrorepairshack/readarticle.php?article_id=9| work=The Retro Repair Shack| date=2007-03-22| access-date=2008-07-15}} An article describing how LINE 0 works on Sinclair computers. No copy protection is embedded into the game; moreover, the magnetic tapes of the time being unreliable, one could reuse the save entry point in the BASIC code (that was used by the original developers to have the game auto-run upon being loaded by the user) in order to save another program copy to the tape (for archival and backup purposes).

The game is controlled by three of the keyboard cursor control keys (left, forward and right, respectively 5, 7 and 8 on the ZX81 keyboard). The game speed can also be controlled{{snd}} according to the original cassette inlay, the BASIC line 370 has a hardwired constant determining a busy waiting loop delay. The constant initially is set to 5; by varying it from 0 to 9 the game can be adjusted from faster to slower tempo. The 6 frame per second figure corresponds to the delay set to zero, while holding the "forward" key to run straight. A somewhat jerky motion is perceived at this slow framerate which gives a feeling of being jerked along with each step of a desperate heavy run.

File:Malcolm-Evans-NGS98.jpeg

3D Monster Maze was the first game programmed by Malcolm Evans based on a design by J.K.Greye.{{cite journal|title=Hit Squad — Not just a load of old rubbish |journal=Sinclair User |date=September 1984 |author=Chris Bourne |issue=30|url=http://www.sincuser.f9.co.uk/030/htsquad.htm |url-status=dead |archive-url=https://web.archive.org/web/20010309055803/http://www.sincuser.f9.co.uk/030/htsquad.htm |archive-date=2001-03-09 }} Featuring Malcolm Evans following the Trashman hit game. He worked in the aerospace industry, first in aircraft design, and then as a microprocessor scientist at Sperry Gyroscope in Bristol, United Kingdom. He received a ZX81 from his wife for his thirty-seventh birthday in April 1981. Malcolm developed basic aspects of the game to test what the computer was capable of, and completed it after adding design features suggested by J.K.Greye, including adding the T.Rex and turning the Maze into a game. Friends persuaded Malcolm that the game was of high enough quality to sell and it was eventually released by J.K. Greye Software in late 1981.{{cite journal|url=http://www.crashonline.org.uk/05/newgen.htm| author=CRASH staff (Michael Broomfield)| title=New Generation Ingredients of a winning team| journal=CRASH|issue=5|date=June 1984}} An article about New Generation Software, the firm that was started with the 3D Monster Maze development.

When soon after that the Bristol branch of Sperry Gyroscope closed, Malcolm made a decision to concentrate fully on computer gaming. The firm New Generation Software he had founded kept producing 3D games for the Sinclair Research computers, and became synonymous with 3D gaming on this platform for some time.{{cite journal|title=3D Games|journal=Sinclair User|author=John Gilbert| date=September 1983|issue=18| url=http://www.sincuser.f9.co.uk/018/3dgames.htm| access-date=2004-11-01| archive-url=https://web.archive.org/web/20041103172529/http://www.sincuser.f9.co.uk/018/3dgames.htm| archive-date=2004-11-03| url-status=dead}} Discussion of the 3D gaming scene on the Sinclair computers, naturally opened by 3D Monster Maze. Some of his games were hailed by the gaming scene, but some titles occasionally drew criticism from reviewers for their fancy graphics but poor game plot. After releasing 3D Defender and Breakout for the ZX81,{{cite journal| title=Greye Defender is another 3D winner| journal=Sinclair User| author=Phil Garrett| date=August 1982| issue=5|url=http://www.sincuser.f9.co.uk/005/softwre.htm| access-date=2006-02-03| archive-url=https://web.archive.org/web/20020223232422/http://www.sincuser.f9.co.uk/005/softwre.htm| archive-date=2002-02-23| url-status=dead}} Games by Malcolm Evans published by J.K. Greye Software. Malcolm switched the development efforts from ZX81 to ZX Spectrum as the latter model was released onto the market. In addition to republishing 3D Monster Maze, the new firm also released such game titles as Escape, 3D Tunnel, Knot in 3D, Corridors of Genon, Trashman and Travel with Trashman, Light Magic, Jonah Barrington's Squash, The Custard Kid and Cliff Hanger.{{cite web| author=Martijn van der Heide| title=New Generation Software| url=http://www.worldofspectrum.org/infoseekpub.cgi?regexp=^New+Generation+Software$| work=Label name information on New Generation Software at the World of Spectrum| year=2005| access-date=2008-03-30}}

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The game was sold domestically in the UK and overseas, and became a hit shortly after it was released:

{{blockquote|... when the ZX81 had just been launched, software standards were generally pretty low. One exception to this rule was a program called 3D Monster Maze, which has been a firm favourite with ZX81 owners since it first appeared ...{{cite journal | title=Writing for the new generation| journal=Home Computing Weekly| date=1983-10-18| issue=33| page=43| url=http://www.worldofspectrum.org/showmag.cgi?mag=HomeComputingWeekly/Issue033/Pages/HomeComputingWeekly03300043.jpg | access-date=2009-05-24}}}}

Contemporary reviews described it as "the best game I have seen for the Sinclair ZX81"{{cite journal | journal=Computer and Video Games |date=April 1983 | issue=6 | page=77 | title=Software reviews: 3D Monster Maze | url=http://www.worldofspectrum.org/showmag.cgi?mag=C+VG/Issue006/Pages/CVG00600077.jpg | access-date=2008-12-07}} and "Brilliant, brilliant, brilliant! Straight away this gets into my personal top ten ZX Programs ... Undoubtedly one of the best ZX programs available.".{{cite journal | journal=Popular Computing Weekly | date=1983-05-13 | issue=820513 | page=10 | title=Reviews - Software: Monster Maze | url=http://www.worldofspectrum.org/showmag.cgi?mag=PopularComputingWeekly/Issue820513/Pages/PopularComputingWeekly82051300010.jpg| access-date=2008-12-07}}

Even though it did not use the undocumented hi-res graphics feature of the ZX81, and rendered the scene with pseudo-graphics characters (available in the standard ZX81 character set), the game was considered to be a remarkable achievement, utilising the machine's capabilities to its best:

{{blockquote|If I had to choose just one programme to impress an audience with the capabilities of the ZX81, then 3D Monster Maze would be the one without a doubt.{{cite journal | journal=ZX Computing | date=December 1983| issue=December/January 1984| page=163| title=3D Monster Maze| url=http://www.worldofspectrum.org/showmag.cgi?mag=ZXComputing/Issue8312/Pages/ZXComputing831200163.jpg | access-date=2008-12-07}}}}

Soon the Sinclair platform users began switching over to the newer ZX Spectrum, which had better graphics resolution and colour, bigger RAM and ROM, as well as sound capability and a sleeker look and feel. Some people still continued to use their ZX81, and even the Spectrum users gave credit to 3D Monster Maze as the game that brought the 3D aspect into the home computer gaming:

{{blockquote|Even those critics who dismissed the ZX-81 as a child's toy, had to admit that the program was innovative and well-presented. Monster Maze marked the rise of the use of 3D techniques on microcomputers as small as the ZX-81 and Spectrum.}}

The success of Monster Maze brought recognition to Malcolm Evans and his company, New Generation Software. As a result, they continued to release more games that further improved the 3D gaming experience. Even when later hit games by N.G.S., such as Trashman, were covered by the gaming media reviews, 3D Monster Maze was remembered as the landmark impressive start:

{{blockquote|From the outset New Generation and Malcolm Evans have become synonymous with 3D graphics ...}}

Edge in 2006 stated that 3D Monster Maze "is the original survival horror game", writing "Ask any player and they'll tell you what 3D Monster Maze was chiefly about: fear, panic, terror and facing an implacable, relentless foe who's going to get you in the end."{{r|e161}} Retro Gamer agreed, in 2014 stating that "Survival horror may have been a phrase first coined by Resident Evil, but it could've easily applied to Malcolm Evans' massive hit."{{cite news |author=Retro Gamer Team |date=2014-02-03 |title=Top Ten ZX 81 Games |url=http://www.retrogamer.net/top_10/top-ten-zx-81-games/ |archive-url=https://web.archive.org/web/20230326214423/http://www.retrogamer.net/top_10/top-ten-zx-81-games/ |archive-date=2023-03-26 |access-date=21 January 2015 |work=Retro Gamer}} With ZX81 games played mostly in emulated environments by the retrogaming community, it still receives enthusiastic reviews, even while modern high-end gaming consoles and home computers provide much richer capabilities for one's immersion into a first-person 3D game:

{{blockquote|Best of the old games we played this month... The best thing about 3DMM was strangely the silence as you moved around. ... This added to the atmosphere. This also added to the scares. There was nothing worse than heading down a corridor and in the distance seeing the start of the dino heading towards you. Because the graphics were slow to draw the dino came at you in a few steps. Turning around and sprinting the other way was a manic dance across the keyboard, while you looked stunned as the screen filled with teeth. It was truly a pants wetting moment.{{cite web | title=Lee's Peek n Poke | work=Issue four: "Look for the green head"| url=http://peeknpoke.gazaxian.com/issue_four.htm| archive-url=https://web.archive.org/web/20080121120303/http://peeknpoke.gazaxian.com/issue_four.htm | archive-date=2008-01-21| date=September 2005 | access-date=2008-12-07}}}}

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• Dungeons of Daggorath
• Maze War

{{reflist|30em}}

• [https://web.archive.org/web/20070222183259/http://carina-e.com/ngs/news.php NGS World] (archive.org){{snd}} a tribute homepage of the New Generation Software titles, created and maintained by Malcolm's daughter Rachel; hosts downloads of the original game and a fan-contributed remake for MS Windows; features a J.K. Greye Software cassette inlay image of the game.
• [http://www.armchairarcade.com/neo/node/977 A Review] of Malcolm Evans' 3D Monster Maze
• [http://www.zx81stuff.org.uk/zx81/tape/3DMonsterMaze(NGS) 3D Monster Maze]{{snd}} the game page on the "ZX81 Tapes, Books and Hardware Collection" site, with the original inlay image as published by J. K. Greye. Includes an emulator to play the game online.
• [http://www.zx81stuff.org.uk/zx81/tape/3DMonsterMaze(NGS) 3D Monster Maze]{{snd}} the game page on the "ZX81 Tapes, Books and Hardware Collection" site, with the cassette inlay image of the title as republished by New Generation Software.

{{New Generation Software series}}

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Category:1981 video games

Category:First-person maze games

Category:New Generation Software games

Category:Single-player video games

Category:Survival horror video games

Category:Video games about dinosaurs

Category:Video games developed in the United Kingdom

Category:ZX81 games

Category:1980s horror video games