Introduction
The time is the 41st millennium. For 20,000 years, mankind has expanded throughout the galaxy, aided by a phenomenal invention known as the Warp Drive, which allows huge spatial distances to be traversed in a matter of hours. Under the auspices of the Emperor, a psychic so powerful he is essentially immortal, a pan-galactic Imperium has been established, in which mankind has spread and prospered.
The defenders of the Imperium are the Legiones Astartes, or Space Marines. These are biogenetically engineered warriors of superhuman prowess, ever vigilant to destroy the many threats that face mankind across the cosmos. Your Mission
You are a Space Marine, belonging to one of the oldest and most honorable Chapters known as the Blood Angels. Their battle honors date back as long as the Imperium has existed. You have acquitted yourself well, even among such heroic company, and it is thus that you find yourself assigned to the Terminator company. Among the thousand warriors that compose a Space Marine Chapter, only the hundred most valorous and gifted brothers are deemed worthy of this honor. Terminators are the Chapter's ultimate warriors, encased in a huge armored suit known as Tactical Dreadnought armor. Protected by this mighty suit that makes them all but impervious to conventional weaponry, and armed with the most devastating weaponry available, Terminators stand in fear of no foe, no matter how potent. The Genestealer Threat
Among the most insidious of mankind's enemies are Genestealers, a strange and terrifying alien race. Reptilian in appearance, they are huge, armored, six-limbed beasts, preternaturally swift and unbelievably ferocious in combat. A Genestealer knows no fear, charging into combat irrespective of any threat to its life. Incredibly hard to kill, and all too capable of inflicting death themselves, it is no surprise that Genestealers are considered one of the foremost threats to mankind's survival.
However, there is another, more frightening element to their nature. Genestealers are incapable of reproducing amongst themselves and must rely on other races to expand their population. The method they employ for this purpose is terrifying:
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Upon encountering a suitable host, such as a human being, a Genestealer will fix its piercing eyes upon it, mesmerizing it much like a Terran snake does its prey.
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While the host is thus hypnotized, the Genestealer will extend its tongue, which contains a hollow, pointed tube known as an ovipositor.
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It will pierce the host's skin with the ovipositor in a gruesome parody of a kiss, depositing a small egg-like cell that contains the Genestealer's genetic profile.
This cell behaves like a cancer, malignantly coursing through the host's system and altering its genetic profile. The victim shows little outward sign of this infection; in fact, he gains some of the Stealer's remarkable strength, resilience, and longevity, becoming healthier than he was before. The effect is only really evident once the victim comes to reproduce.
The Reproductive Cycle
Once they come to mate, the offspring of any victim is born as a Hybrid, a corrupt creature exhibiting characteristics of both Genestealer and host species. The Hybrid itself is equipped with an ovipositor, which it uses in a similar manner to its Purestrain parent.
This cycle continues, with each new generation of Hybrid resembling the host species more and more closely. By the time the Genestealer brood has reached the fourth generation, the offspring is barely detectable as alien, save for a few give-away signs such as unnaturally sharp teeth and a purplish tinge to the skin.
The offspring of this fourth generation is procreated in a conventional manner, resulting in either:
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A normal member of the host species
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A Purestrain Genestealer (the only manner in which Purestrains can be produced)
All the generations are linked in a psychic community, so Purestrains, Hybrids, and hosts all conceive of themselves as constituents of the same brood. Danger to the Imperium
The manner in which Genestealers carry out their reproductive process is of exceptional danger to the Imperium, as whole planets can fall to the Genestealer threat. The affected humans look and act no different from normal, and the hosts are extremely secretive about the insidious curse they bear. Indeed, the first an external agency may know about the presence of Genestealers is once a whole planet has been affected by the curse, requiring total cleansing and repopulation.
Imperial authorities are thus extremely keen to terminate the Genestealer menace at source, before it has a chance to affect any nearby planet. The prime manner in which Genestealers come into contact with humanity is through the use of Space Hulks. These are spaceships of human origin which have become lost in Warp-space, either through a malfunction of the ship's Warp Drive, or just as a consequence of traveling in a medium as uncertain as that of Warp-space. The human occupants having died, Genestealers and their Hybrid brood move in, settling down to hibernation until the drifting Space Hulk comes into contact with a species ripe for infiltration and domination. So thus it is that, whenever a Space Hulk is detected in the proximity of a human planet, the stalwart warriors of the Space Marines are detached to rid the Hulk of its Genestealer cargo, preventing any chance of another planet falling victim to the Genestealer curse. Such is the combat prowess of the Genestealer that only Terminator squads have met with any success. Training Instructions
1. Once Bethor has flamed the two rooms, he still has to do the same with