Travelling through hyperspace can sometimes lead to strange and terrifying results. Each time a ship uses its hyperspace engine, the crew may find themselves either flying through empty hyperspace to their intended destination, or passing by a random chunk of another plane. Few would be pleased to find themselves in either Hell or the Abyss, and even fewer would want to be steering through a hybrid of these two fiendscapes! Close Encounters: Hyperspace Fiends introduces brand-new, Starfinder-compatible rules for interacting with this treacherous subsection of hyperspace and provides stats for 13 of these demons and devils, from the lowly dretch, to the vicious bone devil, to the sword-and-rifle wielding marilith.