From publisher blurb:
The cultists had it all wrong. What if the stars came right and no-one even noticed? Shadowfall takes you to a 1984 where the governments of the world reached an accomodation with some of the universe's horrors and set a watch for the rest, at the cost of giving up what was once best about humanity. Freedom, pity, tolerance -- they've all been traded for security and paranoia, and the powers-that-be admire and even emulate their amoral allies. Intelligence and military ops run amuck and it is not at all a good time to stand out,
Shadowfall is an OSR SF RPG setting using the free Cepheus Engine core rules or other similar game systems. Play in one of 11 new or customized careers and use your wits, your weapons, and maybe a little Lovecraftian super-scientific "magic" to go up against ancient evils and the governments that bend to them. You probably won't live long, but it's not like you have much choice.