Specimen 6, also known as Number Six or Six for short, was a Xenomorph Warrior (and eventual Praetorian and Queen) bred on BG-386 by Dr. Groves and his Weyland-Yutani research team. She was the first Xenomorph on the planet to successfully escape from its containment facility and she was directly responsible for the release of the Xenomorph Queen also held there, thereby triggering a large scale outbreak on the planet.
Bestowed with intelligence in excess of an average Warrior, Specimen 6 was instrumental in the propagation of the Xenomorph infestation on BG-386, and in defeating an Elite Predator was directly responsible for the creation of the BG-386 Predalien. She was later recaptured by Weyland-Yutani, only to escape again and exact revenge on Dr. Groves.
Growth and experimentation
Specimen 6 was birthed in a controlled environment at the Weyland-Yutani research facility on BG-386 by Dr. Groves and his team. Having gestated inside a human host (a restrained technician), she was born directly into a containment tube, just like the other Chestbursters that had been collected at the facility. However, when scientists entered the room to retrieve the creatures, she burrowed back inside her host's chest and emerged from the man's mouth to escape captivity. Dr. Groves promptly activated the emergency coolant systems in the room, killing the scientists and subduing Specimen 6, but the infant Xenomorph was spared at Karl Bishop Weyland's insistence, who was impressed with her intelligence.
Six was placed in a secure harness and branded with the number "6" on her forehead. Over time, she developed to maturity and was subjected to numerous tests by Weyland-Yutani designed to explore her lethality (including being allowed to kill technicians and an armed security guard) all whilst Groves taunted the creature in captivity. During one such test, Six heard the call of the captured Matriarch and attempted to escape through the vents, but was gassed and recaptured shortly afterwards.
Overrunning the colony
The Xenomorphs made their way to the nearby Freya's Prospect colony, where the Matriarch set up her Hive within the ore refinery. Six and the other Warriors moved into the colony itself to harvest the colonists and eliminate the security forces there. A force of Colonial Marines soon arrived on the planet to combat the rapidly spreading infestation, and Six encountered soldiers armed with M260B Flamethrowers in the sewers beneath the colony complex.
With the colony's residents all used as hosts for more Xenomorphs, Six moved into the surrounding jungles, sabotaging the Marines' communications network and infiltrating a Marine outpost there to slaughter those inside. While a group of Marines managed to successfully trap her inside one of the office units, she smashed the lights in the room and hid in the shadows, escaping when the Marines moved in to investigate. Inside the outpost's command bunker, she harvested more civilians and manipulated the controls to the rear gate to make her escape. Acting on the Matriarch's orders, she next made her way to the ancient Yautja ruins on the planet where it encountered and defeated several Weyland-Yutani combat androids guarding the entrance to the Pyramid.
Creating the Abomination
With the androids destroyed, Six and several of her siblings were set upon by two Young Blood Yautja in an ancient combat arena and a brutal battle ensued. By stealth and guile, she killed both Predators, an act that caught the attention of Wolf, a Yautja Elite. Six and Wolf fought in single combat, the latter seeming to have the upper hand for most of the fight. However, the Yautja somehow managed to knock Six in the head, stunning her. Weakened, she fell to the ground, but she was merely playing dead, allowing the arrogant enemy to get close enough for her to launch a surprise attack with its tail, impaling him. Collapsed and at Six's mercy, Wolf was rendered defenseless as she removed his Bio-Mask and pinned it down. A Facehugger consequently latched onto his head and impregnated him as Six screeched in triumph.
Capture and ascendance
Knowing that the Predalien would soon emerge, Six gave a cry of victory before heading back towards the Hive. However, en route to her destination, she was overcome by neural pain as the Matriarch was slain (killed by Rookie) in the refinery. The crippled Warrior, paralyzed by pain, was subsequently captured by combat androids under Weyland's orders, and was taken to an orbiting starship for further study.
Some time later, Six had escaped once more, evolved into a Praetorian, built a new Hive and successfully cocooned Dr. Groves. With her nest established, she had evolved into a new Queen, and gave a monstrous roar of victory.
Specimen 6 was the sixth Xenomorph to be bred by Dr. Groves and his team at the Weyland-Yutani research facility on BG-386. Shortly after birth, she had the number "6" branded into the front of her head. She at first appeared to be a normal Warrior with physical traits typical of the caste, but she later evolved into a Praetorian and later still a Queen. In becoming a Queen, she shed its original carapace and lost the number branded into her head.
Six exhibited physical behavior typical of a Xenomorph, particularly with regards to her unquestioning servitude to the Matriarch. She was capable of moving quickly across walls, floors and ceilings with equal ease, and could leap large distances to rapidly attack prey. Her combat abilities were advanced, as seen when she successfully defeated several Predators, one single-handed. In this regard, she seemed to resemble Grid, who terminated two Predators, unaided, in the pyramid on Antarctica.
As an adult, she frequently displayed advanced situational awareness in excess of an average Warrior, often cutting power to vital systems, destroying light sources to lure or disorient her enemies and give her an advantage in combat. Later, during testing in the research lab, Dr. Groves commented that Six's tactic of displaying caution to armed and dangerous humans is a "strong indicator of intelligence". He also took note of Six's tactic of destroying lights, wondering if this was a "new stratagem"; this would suggest a considerable amount of creativity on the prodigy Xenomorph's part.
It is not clear whether Six's intelligence was a precursor to her ultimate transformation into a Queen, or whether her heightened intellect merely ensured her survival until such a point as she evolved into a higher caste.
- Specimen 6 is the playable Alien character in the 2010 video game Aliens vs. Predator.
- The identifying number stenciled on Six's forehead is likely an homage to the comic Aliens: Nightmare Asylum, in which Xenomorphs bred by General Spears are similarly marked with numbers on the front of their skulls.
- Six is one of the deadliest Xenomorphs ever seen, killing a large number humans and destroying many combat synthetics during its rampage across BG-386. Despite other Xenomorphs possessing possibly higher kill counts, such as the Sevastopol Drone or Mozart, it is debatable whether any of these other individuals would have been capable of killing even a single Predator. Six, on the other hand, was able to kill two, as well as defeat an Elite Yautja in single combat.
- Six is the only protagonist in Aliens vs. Predator never to visit the Pyramid beneath the research labs.
- The character model used for Six's host in the opening cutscene is also used for Franco and numerous other NPCs.
- The vent that Six emerges from at the start of the level "Ruins" is the same one that Connor is pulled into in the Marine campaign (assuming he survives the initial trek through the ruins).
- Specimen 6 is a multiplayer skin in the game, available only to players who pre-ordered the game.
- It is possible that Six turned into a Queen as a result of her exposure to the Royal Jelly in the canisters that she destroyed throughout the campaign. Another theory is that it is simply a result of age; evidence given for this theory is the fact that in total, five Praetorians appear in the game (one is fought by Dark, three are fought by Rookie, and finally there is Six in the Alien campaign epilogue) while at the start of the game, Six and four other Xenomorphs are seen escaping from the research complex.
- Specimen 6 is one of the few Xenomorph Warriors that has been shown to metamorphose into a Queen.
- Several clues throughout the game seem to imply Specimen 6 was originally intended to be a Praetorian for at least part of the playable campaign:
- If the player looks at Six's shadow in the jungle mission, you can see that Six has the head crest of a Praetorian, contrary to Six's appearance in all cutscenes, although it is possible this is just a glitch.
- Also in the jungle level, a Marine states, "Look at the size of this bitch!" when referring to Six, implying she is larger than a typical Xenomorph, again contrary to all cutscenes.
- Specimen 6 appears to 'change' throughout the game, with notable differences to her feet and tail as the player progresses in the story.
- Despite there being at least six Xenomorph specimens bred by Groves' team, Specimen Six is the only one to be branded with an identifying number. This is likely because the developers simply felt it was unnecessary to specify each and every Xenomorph, especially as doing so would require a distinct character model with a different number for each individual.
- Ironically, despite being born from a human and being a warrior instead of a runner, Specimen Six usually runs on all four of her limbs and only stands up straight to perform a stealth kill. Meanwhile, most of the Xenomorphs you meet in the Marine and Predator campaigns, and even those Xenomorphs you meet in the Alien campaign, run on two feet.
- Aliens vs. Predator (video game)