The Rescue at Xerxes 4
The player characters are newly deployed crew heading toward Narendra Station on a shuttle for assignment to their various vessels. During the trip, they receive a distress call from a science outpost on a planet that’s been struck by a highly irradiated ion storm. The shuttle crash-landed on the surface and the crew was attacked by primitive hostile humanoid creatures wielding clubs and rocks.
After dealing with the primitives, the crew can make the journey from the crash site to the science outpost, overcoming various obstacles along the way. At the science outpost, the crew learns that the members of the science team have been exposed to environmental effects that cause them to devolve into Neanderthal creatures.
The crew must rescue the remaining scientists, find the parts needed to repair the shuttle, and decide on whether to risk remaining on the planet to gather the flora that could be used to treat a terrible disease. They must also use their social skills to convince the remaining scientists to accompany them off the planet.
Back at the shuttle it is a race against time, the elements, and the devolved scientists to repair the damage and escape before the ion storm destroys all life.