This 146-page supplement is a comprehensive field guide to the enemies lurking in the Jericho Reach, the setting for the Deathwatch RPG. It is structured into clear chapters, each focusing on a specific category of foe:
Perhaps the most mechanically valuable section for wargamers. Mark of the Xenos introduced specialized Detachments that allowed players to build thematic armies without a single standard Tactical Marine:
Introduction
While the Deathwatch Core Rulebook provides the rules for playing an Astartes and a handful of basic enemies, the galaxy is a crowded place. Mark of the Xenos is the "Monster Manual" for the Jericho Reach. It expands the roster of antagonists significantly, providing Game Masters with the stats, lore, and tactics needed to challenge Kill-teams of any rank. Warhammer 40K - Deathwatch - Mark Of The Xenos.pdf
For those searching for this file, here is exactly what you will find inside. The document is divided into three primary sections:
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Quick GM checklist before using the book This 146-page supplement is a comprehensive field guide
Because Fantasy Flight Games lost the license to produce Warhammer 40K RPGs to Cubicle 7 (and later to Games Workshop itself), the PDF is no longer for sale on official platforms like DriveThruRPG. This has turned the file into an abandoned, yet highly sought-after, legacy document.
In the grim darkness of the 41st millennium, the alien (or "xenos") is a constant threat. While other Imperial forces fight against heretics and daemons, the Deathwatch, the chamber militant of the Ordo Xenos, is specifically tasked with the eradication of extraterrestrial life. The Deathwatch core rulebook established players as members of this elite, but a key piece was missing: a dedicated "monster manual." Mark of the Xenos was published in 2011 by Fantasy Flight Games (FFG) to fill this gap. Serving as a crucial supplement, it provides a massive catalog of alien species, heretics, and chaotic entities that the Deathwatch faces within the Jericho Reach.
Exclusive to the FFG corner of the 40K universe, the Rak’Gol are cybernetic reptilian nightmares from the Koronus Expanse. The PDF details their unique "pain engines" and radiation weapons. They are the perfect "unknown" enemy for a Deathwatch team expecting Orks. Mark of the Xenos is the "Monster Manual"
Just added a legendary resource to the archive:
“Suffer not the alien to live.”