Dra'k'ne Station (1979)

A 64-page booklet detailing a vast alien research station hollowed out of an asteroid. Sabotaged, with its crew either dead or in cold storage, it drifts through the void awaiting the incursions of players, still protected by its automated defense systems and one surviving alien. A complete, massive 12-level adventure for Traveller, the first of its kind, this playing aid is profusely illustrated by Kevin Siembieda and includes insights on the culture, language, and history of the wierd, reptilian Dra'k'ne aliens. This is a complete, well-detailed scenario, with several different types of research labs, repair shops, spare parts depots, recreation areas and more.

According to the Traveller RPG wiki on wikia.com, this was the first published Traveller adventure.