Own an entire old school GDW game line in DRM-Free, legal PDF, sourced directly from FFE.
Almost all of them are $35. This is far cheaper than buying the PDFs individually.
I will mirror Far Future Enterprises‘ 443 sale: Purchase 4 CD-ROMs at regular price, and I’ll refund one of them back: Four for the price of Three.
2300AD

2300AD
Includes all of the Traveller 2300 / 2300 AD titles published by Game Designers’ Workshop between 1986 and 1990. In addition, this CD-ROM includes Operation Overlord (published under license by 3W), The Game (playtest material used in the creation of 2300 AD), Having Seen The Sky, an unpublished manuscript for an adventure to the Pentapods, Now Is The Time, a tournament adventure, and the eighty-three Challenge Magazine articles in support of 2300 AD.
Dark Conspiracy

Dark Conspiracy (First Edition)
Includes the complete first edition canon materials for Dark Conspiracy, including Challenge Magazine articles, the Lost Video, and the boardgame Minion Hunter.

Dark Conspiracy (Second Edition)
Includes the complete second edition canon materials for Dark Conspiracy (both Basic and Masters editions for Players and Referees), the Demonground electronic fanzine (through issue 9), and the three Sin City adventure volumes.
Magazine Archives

Journal of the Travellers’ Aid Society: JTAS Issues 1-36
All 24 issues of JTAS, with searchable text. Plus: The 12 additional issues that were included in Challenge Magazine.

Challenge Magazine: All 53 issues
All 53 issues of Challenge Magazine, from 25 (where it took over from JTAS) to issue 77. A broader spectrum magazine in support of GDW’s (and other publishers’) role-playing games: Twilight: 2000, Dark Conspiracy, Space: 1889, 2300 AD and others. ($44.99)
Traveller

Classic Traveller on CD-ROM
The original texts of ALL of the Little Black Books. Each PDF has searchable text. Traveller Book & Adventure. Books 0 through 8. Supplements 1 -13. Adventures 0-13. Double Adventures 1-6. Games 0-6. Modules 1-5. Aliens 1-8. Special Supplements 1-3.

Traveller Apocrypha-1: FASA and Gamelords
Includes the licensed Traveller materials from FASA (10 deck plan sets & 9 adventures) and GameLords (11 adventures & supplements) on PDF.

Traveller Apocrypha-2: Judges Guild and more
Includes the licensed Traveller materials in PDF from Judges Guild, Paranoia Press, Mike Jackson’s inspired Third Imperium, Steve Jackson’s Cardboard Heroes, glimpses of miniatures from Grenadier, Citadel, and Martian Metals, and articles from Dungeoneer, Space Gamer, and Dragon.

Traveller Apocrypha-3: The Lost Supplements
Includes the legendary Lost Supplements: licensed Traveller materials written by the Keith brothers but published only in limited editions. This disk also includes the limited distribution Marischal Folio Adventures, and the Traveller Chronicle magazine.

Megatraveller
The original texts of all MegaTraveiler science-fiction role-playing materials published by GDW Game Designers’ Workshop between 1988 and 1994. Each PDF contains original page images and searchable text. Plus: Poster. Maps. Official Guide to MegaTraveller.

Traveller – The New Era
The original texts of all Traveller – The New Era science-fiction role-playing materials published by GDW Game Designers’ Workshop between 1992 and 1996. Each PDF contains original page images and searchable text.

TNE: The Extended Canon
Traveller – The New Era: 1248. Years after the classic TNE setting, and the former Imperium begins to rebuild in strange ways. This disk contains the Extended TNE Canon: the Challenge Magazine articles, and a look at the ads and header art of TNE

Traveller 4th Edition T4
The canon for Fourth Edition Traveller– the original texts of all of the rules, supplements, and adventures produced by IGI Imperium Games Incorporated for the ground-breaking and award-winning science-fiction role-playing game, including the supporting Journal of the Travellers’ Aid Society issues 25 and 26. Each image and text PDF contains original page images and searchable text. All files are printable in whole or in part. Plus: the Official Guide to Fourth Edition Traveller, and an overview of the canon for the game system.

GURPS Traveller Disk 1: People
Includes more than two dozen GURPS Traveller sourcebooks on PDF, plus the core GURPS Traveller books.

GURPS Traveller Disk 2: Starships
Includes more than a dozen GURPS Traveller sourcebooks and deckplans on PDF, plus the core GURPS Traveller books.

GURPS Traveller: JTAS Journal of the Travellers’ Aid Society Online Archive
CD-ROM includes JTAS Online, Grognard Ebook, Grognard PDF.

Traveller HERO System on CD-ROM
Traveller HERO System RPG: Core Rules (9 titles). Starships (8 titles). The Spinward Marches (5). Supplements (6). Resource Folders (3).

Traveller 20 on CD-ROM (Traveller D20 System RPG)
45+ rule books, sourcebooks, adventures, and maps for D20 Traveller RPG.

Traveller 5 on CD-ROM (Traveller5 T5 RPG)
The original text of Traveller 5. PDF with searchable text.
Twilight: 2000

Twilight: 2000 v1.0
This CD-ROM includes all of the Twilight: 2000 Version 1.0 titles published by Game Designers’ Workshop. In addition, this CD-ROM includes the Twilight: 2000 v1.0 articles in Challenge Magazine issues 25 through 44.

Twilight: 2000 v2.2
This CD-ROM includes all of the Twilight: 2000 Version 2.0/2.2 titles published by Game Designers’ Workshop between 1990 and 1996. Original page images and searchable text.

Twilight: 2013
This disk includes all of the canonical 2013 titles. Core Rules, Rules Addendum, Character Dossier, and over a dozen more titles.
See Also:
My home game, since 2017: FROM POLAND TO AMERICA: OUR CLASSIC TWILIGHT 2000 RPG CAMPAIGN