The remains the definitive guide to the alien monstrosities lurking in the void between stars. It represents a golden era of 40K RPGs—a time when the focus was on investigation, tactics, and the creeping dread that even a Space Marine can be outmatched by a strange biology.
Download the PDF for reference. Use it to inspire your Kill Team’s paint schemes. Steal its Stratagems for your homebrew Crusade. And always, always know your xenos. Warhammer 40K - Deathwatch - Mark Of The Xenos.pdf