From publisher blurb:
Welcome to the gritty, retro-future universe of HOSTILE which now expands with its own, dedicated rulebook. Based on the Cepheus Engine, these Rules add in the realistic combat rules from Zozer Games’ popular Modern War game, as well as setting-specific rules from some of the eighteen HOSTILE supplements. When combined with its companion book, the HOSTILE Setting, you will have a complete, stand-alone, retro-future sci-fi game.
HOSTILE is a gritty, near future roleplaying setting that is inspired by movies like Outland, Bladerunner and Alien. It is a universe of mining installations, harsh moons, industrial facilities, hostile planets and brutal, utilitarian spacecraft.
Comprehensive task resolution mechanics
An expanded character creation system, with a non-random character design option
Survival rules from deserts to radiation, deep sea diving to acid … and more
Stress and panic rules
Starship combat mechanics
Tactical combat rules that include area fire, aimed fire and vehicle combat
Handling friendly NPC teams and squads
Spaceflight operation and procedure guidelines
Advice and guidance on interpreting the world data
Trade, speculation and salvaging
Encounter tables: in space, on planet, within colonies and at the starport
A full chapter of referee advice on running HOSTILE
With a variety of realistic photo-illustrations and replica documents