After thousands of years adrift in the warp, the space hulk Gallowdark has emerged into realspace. A colossal, moon-sized derelict inhabited by mutants, aliens, and things known only by the screams of their victims, the Gallowdark's shadowy depths hold prizes beyond comprehension – ancient treasures, arcane weapons, and secrets forgotten to the galaxy. Kill teams of deadly operatives stalk each other through winding corridors and decaying machinery, conducting daring raids, assassinations, sabotage, and epic last stands that engulf the Gallowdark in a shadow war.