Ristin's Campaign Construction Center
D20 Traveller…oh man it’s horrible. All the rules in the book are awfully presented, and the proof reading is nonexistent…the classic example is there are class features referring to rules that don’t exist.
It is, literally, unplayable.
But the setting is great and there’s a lot of support for the Traveler setting split over many game systems including the original Traveler system, GURPS, then into D20.
I would recommend that anyone keen to play a Traveler setting game look to D20 Modern and D20 Future as a game system. Because GURPS Traveler is unfortunately under the GURPS system, and D20 Traveler is unplayable.