If you want to play a horror scenario for Traveller, then I would say that you should have a look at Challenge #46. It is a Special Horror Issue.
In this issue you can find a 6-page article about scary wizards and witches, with three interesting adventure hooks. There is a four page scenario with some nasty surprises about salvaging a haunted scout-ship. The final (and maybe most scary) scenario is about encountering a ghost ship in jump space. It is written by Mike Mikesh. This scenario also includes deckplans of a 600-ton subsidized liner. All of these articles for Traveller are very good and usable. But there is more…
There is a scenario for Twilight: 2000, one for Space: 1889, one for 2300 AD, one for Cyberpunk, two for Shadowrun, one for Torg, two for Call of Cthulhu, one for Star Wars and one other (for fun). The one for 2300 AD would be easy to adapt for Traveller if you need another scenario.
Other horror scenarios for Traveller can also be found in:
- Challenge #54: This is another Special Horror Issue.
- Double Adventure 5: The Chamax Plague / Horde that could be turned into an Alien style bug hunt. (Also in JTAS #17)
- JTAS 16: An Amber Zone scenario (called The Day of the Glow) about “Vampires”.
- JTAS 15: An Amber Zone scenario (called chill) also about “Vampires”.
- JTAS 5: An Amber Zone scenario (called The Werewolf Disease) that isn’t about vampires.
EDIT: DriveThruRPG has now updated the cover image. Challenge #46 is now number 1 in the Top 100 Products list.