"A supplement for Warhammer 40,000. You will need a copy of the Warhammer 40,000 rules in order to use the contents of this book"--Back cover.

The day of ascension has come! The Genestealer Cults erupt from the shadows in a tide of mutated acolytes, turncoat soldiery and predatory xenos monsters. They employ ambush and subterfuge to outmanoeuvre their enemies, turning industrial mining equipment and repurposed civilian vehicles into potent weapons of rebellion against the hated Imperial oppressors. Propaganda, mind control and assassination are all weapons in thier arsenal. Irredeemably corrupted by Tyranid gene-taint, the cults fight with the coordination of swarming insects and the zealotry of true believers, convinced that they are freedom fighters whose heroic efforts will earn them divine rewards. In truth, they are agents of destabilization and anarchy - living weapons seede behind enemy lines to spread, multiply and undermine Humanity's fight against the encroaching Tyranid hive fleets. As the Genestealer Cults raise their wyrm-form icons above the blazing skylines of ever more Imperial planets, it becomes apparent that this ghastly plan is working all too well...