Posse Comitatus

From publisher blurb:

An act of violence puts the PCs squarely in the middle of conditions in a lawless mining colony and in the crosshairs of the colony’s would-be dictator, a rogue mercenary determined to bend the installation to her iron will. The heroes’ interference allows a distress signal to finally be dispatched, but until help arrives the occupiers must be shown that law and order prevail, and it’s up to the band of adventurers to deliver it. On a world where life is cheap and death comes at a moment’s notice, can the heroes prove themselves up to the task?

Posse Comitatus is an adventure designed for Cepheus Engine and other 2D6 science-fiction RPGs, including the Original Science Fiction Roleplaying Game.