From publisher blurb:
Destination: Tartarus takes the characters on a dangerous rescue mission through space to the outer edge of the Solar system.
They soon learn that their objective is different from what they’ve been told and the final outcome could affect the balance of power in the entire system - or return them to their home dimension!
Destination: Tartarus can also be used with other OSR-style science fiction roleplaying games with little to no modification. A hit point is still a hit point and an armor class is still an armor class.
This adventure scenario is designed for 4-6 player characters of 6th to 8th level. The player characters should include at least one character displaced from Dimension-Prime - that is, our modern dimension.
This adventure scenario assumes that player characters are either agents of the Earth Resistance or freelance operatives hired by them.