All the wonder and danger of the stars is yours - if you can just wipe the grime off your face and dig the dirt out from under your fingernails first. Airless moons circle swirling gas giants, eager to be transformed into tomorrow's paradise. Dark ancient mysteries wait to be unearthed beneath a millennium of debris. Searing solar flares boil your flesh and blacken your bones as you harness their power to light a hundred worlds. Long lost mysteries lie entombed in the frozen hearts of icy comets. Even the truth of humanity's origins awaits you out there, orbiting some dying star. And out there amongst it all is something truly horrifying - something that nature never intended. Something alien. ALIEN RPG: Building Better Worlds is a 292-page campaign book for the award-winning official ALIEN roleplaying game, giving you all the tools you need to run a full open-world campaign as pioneering explorers or colonists.