High Quality Content by WIKIPEDIA articles! Expedition to the Barrier Peaks is a 1980 adventure module for the Dungeons Dragons roleplaying game written by Gary Gygax. While Dungeons Dragons (D D) is typically a fantasy game, the adventure includes elements of science fiction, and thus belongs to the science fantasy genre. It takes place on a downed spaceship; the ship`s crew has died of an unspecified disease, but functioning robots and strange creatures still inhabit the ship. The player characters fight monsters and robots, and gather the futuristic weapons and colored access cards that are necessary for advancing the story.