The Hostile Roleplaying Game is published by Zozer Games, and comes as two books: Rules and Setting. Take a dive into the Setting book and find out why it was written, what it contains and how it came into being.
Zozer Games: https://www.paulelliottbooks.com/
DriveThruRPG: https://www.drivethrurpg.com/browse/pub/3743/Zozer-Games
Books In Print: https://www.lulu.com/shop/paul-elliott-and-ian-stead/hostile-setting-hardback/hardcover/product-yq86jw.html?q=hostile+zozer&page=1&pageSize=4
Music by Karl Casey @ White Bat Audio