In the grim darkness of the far future, there is only war—and for the Deathwatch, there is only the hunt. Among the most prized and elusive tomes for any Deathwatch player, collector, or lore enthusiast is the legendary supplement known as “Warhammer 40K – Deathwatch – Mark of the Xenos.pdf.”

| Original 7th Edition Rule | 10th Edition Equivalent | | :--- | :--- | | Preferred Enemy (Xenos) | Re-roll Hit Rolls of 1 (use Oath of Moment or a Watch Master’s ability). | | Clavis (Disrupt Vehicle) | Use the Armour of Contempt Stratagem or treat as a 4+ Anti-Vehicle Grenade. | | Xenophase Blade (Ignore Invulns) | Already present in 10th; the PDF confirms its original intent. | | Purgatus Formation | Convert to an Enhancement: Psychic Hunter (+1 to Wound vs. Psyker units). | It is important to address the elephant in the room. Games Workshop no longer sells Mark of the Xenos as a standalone PDF. The official store page redirects to the 9th Edition Deathwatch Codex. Because of this, the Warhammer 40K – Deathwatch – Mark of the Xenos.pdf exists in a legal grey area. It is considered “Chapter Approved Legends” material—unofficial but beloved.

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.

The Vigil is eternal. The Alien dies. Disclaimer: This article is for informational and educational purposes. Games Workshop, Warhammer 40,000, Deathwatch, and Mark of the Xenos are trademarks of Games Workshop Group PLC. No copyrighted files are hosted or linked here.

Whether you are a veteran of Watch Fortresses or a new recruit just mustering your first Kill Team, understanding this document is essential. This article provides a complete breakdown of its contents, its historical context within the game, why it remains relevant in modern 10th Edition, and where its legacy endures. Originally released as a supplement for Warhammer 40,000’s 7th Edition , Mark of the Xenos was part of a trilogy of digital and physical expansions for the Deathwatch faction. While the core Deathwatch codex introduced the Chamber Militant of the Ordo Xenos, Mark of the Xenos was the bestiary—a hunter’s manual detailing the galaxy’s deadliest alien creatures and, more importantly, the specialized tactics, wargear, and formations used to exterminate them.

Modern 10th Edition lacks the granular alien-specific rules this PDF provides. Many narrative Crusade groups homebrew rules directly from this document, converting the old Kill Protocols into 10th’s Stratagem system.

The specialist rules for Kill Team: Cassius and the subsequent Deathwatch Kill Teams borrow heavily from the formations listed here. Understanding the original source material gives you an edge in customizing your operatives.

Keep the PDF as a historical artifact. For players : Always check with your tournament organizer before using rules from this document; it is best suited for casual, narrative, or open play. Final Verdict: Is It Worth the Hunt? Absolutely. Whether you find a physical copy or the Warhammer 40K – Deathwatch – Mark of the Xenos.pdf through the data-vaults of the internet, this supplement is the definitive guide to the alien-hunters’ art.