From publisher blurb: The HOSTILE Technical Manual digs deeper into the retro-technology of this alternate future. It includes in-depth articles on hyperdrives, artificial gravity, androids, fusion power, hypersleep chambers, communications and computers. It also explains the existence of 'retrotech' - could a futuristic setting live this way? How would it come about? Essays by the experienced contributors Richard Grove, Shawn Fisher and Paul Elliott add a little more detail, a little more verisimilitude to your HOSTILE roleplaying games. So when some player asks you, "can I contact the USCS Cheyenne while in hyperspace?" you will have an answer! HOSTILE is a gritty SF setting based on thos ate-70s and early-80s movies we all grew up with, and can be played with Cepheus Engine or any version of the Classic 2D6-based SF RPG. Our setting of course, must not just look and feel realistic, it must act realistically. Of course much of this technology is imaginary, yet we still want a sensible degree of engineering logic to back it all up. If the player characters want to disable all the anti-gravity on a ship’s deck, were do they go? What kind of infrastructure will they be sabotaging? It’s these practical in-game problems that depend on what would normally be considered the totally theoretical and frivolous assertions appearing within the HOSTILE Technical Manual.