Download *
Requires a TADS interpreter. Visit IFWiki for download links.
Mac OS Application (Compressed with StuffIt, encoded in MacBinary format. Free StuffIt Expanders are available for most systems at
Mac OS Application (Compressed with StuffIt, encoded in BinHex format. Free StuffIt Expanders are available for most systems at *
MS-DOS Application
Walkthrough and maps
by David Welbourn
Version 2.0 *
Contains shelby.gam
Requires a TADS interpreter. Visit IFWiki for download links.
* Compressed with ZIP. Free Unzip tools are available for most systems at

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The Light: Shelby's Addendum

by Colm McCarthy profile

Part of Quest Adventure
Science Fiction

About the Story

You play as Maurice L. Shelby, a laboratory apprentice employed by Commission Research Station 12B. The station is rather important: it houses one of several beacons placed around the world that generate the dimensional field that prevents total disaster. (It's a long story.) Unfortunately, you'll learn that one of the researchers has gone mad and stolen the beacon's phase modulator! The entire planet is doomed unless you can retrieve the modulator and restore the field.

Game Details

Language: English (en)
Current Version: Release 2.1
License: Shareware
Development System: TADS 2
Baf's Guide ID: 188
IFID: TADS2-B9D4C9034B21BB9A00E3309FD9B5B9E8
TUID: ehgrdmftq2kj7cci

Off-Site Reviews

Disconnected Illusions
Overall, LSA is not too bad. Its shortcomings are only particularly noticeable when you see how much better it could have been. [...] As it is, hurried along by the limited plot, I never connected with the characters or environment.
See the full review

In truth, despite the incongruency of the puzzles, I hasten to say that I enjoyed "Shelby's Addendum" a great deal. This game is well written. The plot is great, there's a bit of horror (but nothing overboard), the characters are well developed (including the player's character, which is unusual in IF but handled beautifully here), and the room descriptions and scenery descriptions are vivid and consistently of the highest quality. (Molley the Mage)

I've been rather harsh in this review; there are good aspects to "The Light: Shelby's Addendum," and it would not have been out of place had it appeared as a mid-period Infocom game. But I didn't enjoy playing it very much because the moments of excitement were few and far between. (Gareth Rees)
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Xyzzy News
The room and object descriptions are very well detailed, which contributes a lot to the atmosphere. Very often using the EXAMINE ALL or SEARCH ALL commands is key to finding a missing crucial object or discover how to solve a certain puzzle. There are also many nice touches that add an air of sinisterness, such as the blood-covered mophead or a lingering bad smell.
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Page Update History

v.9: 05-Mar-2021 19:15 - Zape (Current Version) - Edit Page - Normal View
Changed download links
  v.8: 05-Mar-2021 19:15 - Zape
Changed download links
v.7: 18-Aug-2020 18:34 - Zape
Changed author, download links
v.6: 30-Jun-2020 08:05 - Zape
Changed external review links
v.5: 15-Apr-2020 14:02 - Lance Campbell
Changed external review links
v.4: 05-Oct-2016 05:21 - David Welbourn
Changed description, download links
v.3: 03-Mar-2013 13:34 - Edward Lacey
Changed external review links
v.2: 17-Feb-2013 08:33 - Edward Lacey
Changed external review links
v.1: 16-Oct-2007 01:48 - IFDB
Created page