In 1986, The Journal of the Travellers’ Aid Society (JTAS), GDW’s Traveller magazine, changed format to support the Twilight: 2000 game. T2000 had grown to become an important product line for the company.
Check out my ongoing Twilight 2000 campaign blog: Poland to America
The new magazine was named “Challenge: GDW’s Magazine of Adventure Gaming”. It would continue from the last issue of JTAS (#24).
Challenge magazines for sale in the shop.
Challenge #25 had a thick module-format cover. It would be the only such issue to get that treatment. All subsequent issues had a thinner magazine-type cover.
JTAS would be in its own section within Challenge magazine.

JTAS #25 had a “cover” and a table of contents page.

This independent JTAS section didn’t last long. Challenge #26 had a JTAS “cover” and ToC. Challenge #27 did away with the ToC, and by issue 29, the independent JTAS section was gone. The magazine did continue its roughly 50/50 treatment of Traveller and Twilight 2000 for many subsequent issues.
JTAS briefly saw a revival during the Imperium Games Traveller era.
Challenge Magazine, issue 30 cover
EDIT 2 August 2000
The cover of #30 (1987) caught me eye today, some great Twilight 2000 art of perhaps a PC party. Or marauders. Or both. (Artist credit: Kim Gromoll)

The group is planning their route, with their BMP APC in the background, complete with pirate flag, pots ‘n pans, and live chickens.




See also: Twilight: 2000 (1st Edition Box Set) – Photo Gallery
Armoured Trains: An Illustrated Encyclopedia 1825-2016
Traveller Supplement 2: Animal Encounters – US (GDW) and UK (Games Workshop) editions
Traveller Adventure 6: Expedition to Zhodane (1981) – US (GDW) and UK (Games Workshop) editions
Azhanti High Lightning – A Traveller Megadungeon