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This article is about the the Tyranid species. For other uses of Genestealer, see Genestealer (disambiguation). |

A Genestealer is a species of Tyranid used as the ultimate shock trooper. Their purpose is to advance ahead of a Hive Fleet and pinpoint potential planets for the Tyranids to devour. They are amongst the deadliest creatures in the Galaxy, combining high cunning and lightning-fast reactions and movement, with large, extremely sharp claws that can rip through the toughest armour in seconds.[1b]
History
Genestealers were the first Tyranid species to be encountered by the Imperium. But before the Imperium had knowledge of the Tyranids as a species, they believed Genestealers were a separate species indigenous to the moons of Ymgarl (using leech-like creature called Csith as main host for reproduction)[11] but then spread to other planets by infiltrating passing cargo ships and derelict Space Hulks.[1a] It is believed Genestealers were introduced to the moons of Ymgarl in M35 from Hive Fleet Tiamet in the Tiamet System, carried inside the Imperial vessels that were sent to destroy the system.[2a] In 680.M41, the first Genestealer Cult was encountered by the Imperium on Ghosar Quintus.[9]
When the Battle for Macragge with Hive Fleet Behemoth took place, Technomagi spent years classifying the left-behind bodies, including Genestealers used as Tyranid shock troops. Further investigation confirmed that all Genestealers were in fact Tyranids.[1a]
The truth is that infiltrating Genestealers had been working their way into the galaxy for thousands of years prior to the invasion of the Hive Fleets proper.[3]
Basic Info
Ordo Xenos Departmento Analyticus Record[5] | |||
Designation | Genestealer | ||
Common Title | Stealer,[2c] Leech,[2c] Sewerstalker,[2c] Scuttler,[2c] Clawfiend,[2c] Ghost,[2c] Snatcher-devil,[10b] Cave Nightmare,[10b] Clawed Changeling[10b] | ||
Species Name | Corporaptor hominis, Corporaptor ymgarli,[5] Vermis (Tyrannus) Furii[4b] | ||
Average Height | 1.9m | ||
Average Weight | 0.3 tonnes | ||
First encountered | Ymgarl | ||
Role | Infiltration | ||
Threat evaluation | High |
Biology
Genestealers are stronger and hardier than Humans, able to withstand even the most hostile environments unprotected, including hard vacuum, and are capable of living for centuries.[6] They are a highly intelligent species with a disproportionately large and adaptive brain that is housed in a bulbous head.[1b] They combine extraordinary intelligence and subtlety of mind with remarkable strength and quickness of body.
Genestealers are bipedal, standing in a perpetual crouch, and have two sets of arms, one equipped with Human-like hands, one with powerful ripping claws. Their dense musculature and the distending hinge of their jaw allows the generation of incredible bite-pressure.[4b]
Their olfactory organ is linked at its base to the rear of their palate, combining their scent and taste for possible use as a sophisticated air-analysis method. They also display respiratory gill systems along the dermis/valves between their fused exo-ribs. This system is then somehow linked to breathing holes on their limbs and cranium.[4b]
However these characteristics may not be general across all Genestealers, as they are one of the most mutable Tyranid species and often exhibit a wide and varying range of different traits. It has been hypothesised that these traits manifest depending on the particular host species the infection discovers; this theory has been disregarded by some experts, citing that the traits are more likely different Genestealer subspecies altogether, which are separate from the host.[2c]
Purestrain Genestealers are Genestealers that have been spawned not through the process of infecting hosts but rather by the hive ships themselves in great bio-factories and birthing vats. Not polluted or altered by “inferior” genetic material, they are markedly stronger and faster than a normal Genestealer and possess a wider variety of adaptive biomorphs. This is intentional, as Purestrain Genestealers are the creatures from which all other Genestealers are born, and even a single Purestrain Genestealer can create a vast brood from a local population given time and enough raw material.[7]
Reproduction
Possibly the most terrifying aspect of Genestealers is their insidious method of reproduction. Genestealers reproduce completely separate from a Hive Fleet, unlike the majority of other Tyranid creatures. Through the use of a tube-like tongue called an Ovipositor, known informally as the Genestealer's Kiss,[10a] they insert a tiny embryonic organism containing their own genetic material into a host victim. Over time this organism alters the host's genetic code, and their consciousness is also completely suppressed by a localised version of the Hive Mind, known as the Brood Mind, becoming a virtual slave. Any offspring born by the host will be horrific Genestealer Hybrids, which the host will be psychically mesmerised to care for, giving rise to the Genestealer Cults that grow in secret within human and other societies.[3][4b][4c]
Oviposition of victims is quick but not instantaneous, and should the Genestealer be killed, distracted, or otherwise interrupted during the act only a partial infestation will occur. This imparts the quasi-host with some aspects of a true hybrid, potentially including an extreme will to survive, vulnerability to a Patriarch's influence, and other related conditions, while still retaining much of their free will.[18]
The psychic control of the Genestealer's Kiss can be resisted by Space Marines, as seen with members of the Scythes of the Emperor. However even they wear psychic dampening hoods to keep out the Hive Mind's urgings.[13]
Other sources show that Genestealers can reproduce by capturing women, fusing them to walls of organic material, then impregnating them with eggs that slowly grow before bursting from their bellies.[21]
Brood Mind
Genestealers have an interlinking telepathy similar to the greater Hive Mind which is generated by the entire Tyranid race. This Brood Mind is smaller and more localised than the Hive Mind and is used to exert complete control over their host victims[3] and also for communication.[6] Their telepathic link with each other can function clearly and without restriction (such as from intervening objects or other forms of shielding) up to one kilometre.[8] It also acts as a psychic beacon to draw a Hive Fleet towards the infestation in order to devour the planet.[3]
Sub-Species
Broodlord
A Broodlord is the Genestealer leader organism, the strongest and most dangerous Genestealer of the brood.[1b]
The relationship, if any, between the Broodlord and Genestealer Patriarch is undetermined.
Patriarch
A Genestealer Patriarch is the founder and leader of a Genestealer Cult.
Ymgarl Genestealers
A Ymgarl Genestealer is a unique Genestealer subspecies that can morph its own flesh within moments to react to incoming attacks or change its colour to remain unseen.[1c]
Malstrain Genestealers
A Malstrain Genestealer is a unique Genestealer subspecies that was created on Necromunda. Malstrains are heavily mutated from baseline Genestealers and as a result of this, the Tyranids' Hive Mind refuses to answer their psychic call.[19]
Infiltration
Genestealers form the first wave of a Tyranid invasion, either infiltrating a suitable world hundreds of years before the actual invasion, or in the more short term, where they are deployed onto a planet by Mycetic Spores from the hive fleet. In both cases they pave the way for the invasion by weakening the planet's defences.[2b]
Infiltration Cycle
Once upon a new world, the Genestealers seek out all forms of life, attempting to home in on species of a highly organised nature. Genestealers at first concentrate on infecting host victims, who go on to breed Genestealer/host hybrids and begin a generational cycle of new hybrids increasingly like the host species. Over decades, the hybrids will spread through a society and a hidden cult is established within the host's society. All members of the Genestealer cult are psychically linked and controlled by the original Genestealer. The cult is totally devoted to gaining political power within the society, often cloaking itself in the guise of a legitimate religion, while infecting suitable hosts, prospering and multiplying, and hiding their true nature from the broader society.[6]
Hive Fleet Invasion
The Brood Mind of a Genestealer infestation acts as a psychic beacon to draw in a Tyranid Hive Fleet. When a Hive Fleet comes within a few hundred light years of an infected world, a subliminal reaction is triggered within the Brood Mind which forces the Genestealers into a frenzy of killing and breeding, thus collapsing the society in which they were hidden and making way for the full Tyranid invasion.[3]
However Genestealers are notoriously independent from the Hive Mind and have a great will to survive. During a planetary invasion Genestealers wanting to survive are innately driven onward and outward from the Hive Fleet by infiltrating fleeing ships. Or, after the invasion, the Genestealers are reabsorbed into the Hive Fleet as pure bio-matter like all other life is. The infiltrating Genestealers go on to infest more worlds and then in turn lead the Hive Fleet to them. No one amongst the Imperium knows how deep and widespread the Genestealer infestation of the galaxy has become.[1b]
Notable Encounters with Imperium
- Moons of Ymgarl encounter
- 996.M40 — Blood Angels Chapter boarded of unknown Space Hulk with Genestealers aboard - of all Chapter only 50 Space Marines survived.
- ???.M41 — Blood Angels first company under the command of Captain Michaelus Raphael boarded the Sin of Damnation space hulk where genestealers prospered. All Xenos destroyed.
Names of Genestealers in Languages of Other Races
Eldar know Genestealers by many names, the most famous of which are — The Hider in Plain Sight, Hearth-lurkers, Bloodshadows, Kin-thieves.[12]
To the t'au they are known as Y'he'mokushi, described as "beasts of the Silent Hunger" who "steal form as well as substance."[17]
Images
Genestealer miniature (Space Hulk 1st Edition)
Genestealer miniature from (Inquisitor)
Genestealer miniature (Space Hulk 3rd Edition (2009))
Purestrain Genestealer from Deathwatch: Overkill (2016)
See also
Sources
- 1: Codex: Tyranids (5th Edition):
- 2: Codex: Tyranids (4th Edition):
- 3: Space Hulk Mission Book (3rd Edition), pgs. 46–47
- 4: Xenology (Background Book):
- 5: Imperial Armour Volume Four - The Anphelion Project, pg. 101
- 6: White Dwarf 114 (UK), White Dwarf 115 (UK), Genestealers
- 7: Deathwatch: Mark of the Xenos, pg. 39
- 8: Only War: Salvaging Solace, pg. 17
- 9: Deathwatch: Overkill
- 10: Codex: Genestealer Cult (7th Edition):
- 11: Warhammer 40,000: Rogue Trader, pg. 211
- 12: Ghost Warrior: Rise of the Ynnari (Novel), Chapter 24
- 13: Belisarius Cawl: The Great Work (Novel), Chapter 17
- 14: Codex: Tyranids (6th Edition) (E-Book) - Forces of the Hive Mind"
- 15: Deathwatch: Overkill rulebook, pg. 23
- 16: Games Workshop Boxed Games: Deathwatch Overkill (last accessed 3/16/2021)
- 17: A Sanctuary of Wyrms (Short Story)
- 18: The Greater Evil (Short Story)
- 19: Warhammer Community: Warhammer Preview – Plunder the Haunted Depths of Necromunda: Hive Secundus (Posted on 18/05/2024) (Posted on 18/05/2024)
- 20: Magic the Gathering Genestealer Card (last accessed 28/6/2024)
- 21: Deathwatch (Novel), Chapter 13
Uncited
- Codex: Tyranids (3rd Edition)
- Deathwatch (Graphic Novel)
- Space Hulk (Game)
- Bringers of Death (Anthology)
- For The Emperor (Novel) by Sandy Mitchell
- Genestealer (Game)
- White Dwarf 135 (UK)
- pgs. 24-25 - Freebooter Army List, 'Ork Genestealer Hybrids'
- pgs. 33-35 - Games Workshop: Modelling Guide, 'Ork-Genestealer Hybrids'
Genestealer Cult Forces | |
---|---|
Leadership | Patriarch • Magus • Primus • Abominant • Jackal Alphus |
Specialists | Biophagus • Clamavus • Kelermorph • Locus • Nexos • Reductus Saboteur • Sanctus • Benefictus |
Troops | Acolyte Hybrid • Neophyte Hybrid • Metamorph Hybrid • Brood Brother • Purestrain Genestealer • Aberrant • Familiar • Mindwyrm Familiar • Atalan Jackal |
Vehicles | Dirtcycle • Wolfquad • Goliath Truck • Goliath Rockgrinder • Achilles Ridgerunner • Chimera • Sentinel • Leman Russ (Eradicator • Exterminator • Vanquisher) |
Other | Tectonic Fragdrill |