Infocom Homepage: HGttG

Description, release information, statistics, and packaging details.
http://www.csd.uwo.ca/~pete/Infocom/hitchhikers.html

DouglasAdams.com: The Hitch Hiker's Guide to the Galaxy - The Adventure Game

Play the text adventure on-line using Java on Douglas Adams' website.
http://www.douglasadams.com/creations/infocom.html

Adventure Collective review

[4/5] by Joshua Mintzer
http://www.adventurecollective.com/reviews/hitchhikersguidetothegalaxy.htm

The Restaurant at the End of the Universe

Stu Galley's explanation of why the sequel was never released.
http://www.csd.uwo.ca/Infocom/restaurant.html

The Infocom Gallery: The Hitchhiker's Guide to the Galaxy

High-quality scans of packaging, manual, "Don't Panic!" button, pocket fluff, demolition orders, and microscopic space fleet.
http://infocom.elsewhere.org/dsinclair/hhgttg/hhgttg.html

New Zork Times: Don't Panic

Text of game announcement from Infocom's newsletter.
http://www.csd.uwo.ca/Infocom/Articles/NZT/Nztfal84.html#hitch

Infocom Games: Hitchhiker's Guide

Box scans, introduction, specifications and sample transcript.
http://www.infocom-if.org/games/hhgttg/hhgttg.html

Radio 4 Revives Hitchhiker's Game

A Douglas Adams game is revived to mark a new Hitchhiker's Guide To The Galaxy radio series. [BBC News]
http://news.bbc.co.uk/1/hi/entertainment/tv_and_radio/3615046.stm

BBC Interview with Steve Meretzky

Steve Meretzky talks about Douglas Adams, game difficulty, non-linearity, and deadlines. [Contains puzzle spoilers.]
http://www.bbc.co.uk/radio4/hitchhikers/stevem.shtml

The Hitchhiker's Guide to the Galaxy

An illustrated, on-line playable (Flash) 20th anniversary version.
http://www.bbc.co.uk/radio4/hitchhikers/game.shtml