After Gordon enters Xen, the Nihilanth regularly contacts Gordon telepathically and occasionally taunts him. Gordon Freeman is tasked with killing the Nihilanth as he was the only force holding the dimensional rift open after the Satellite Delivery Rocket launched by the Black Mesa Lambda Labs failed to reverse the Resonance Cascade.
Ultimately however, this backfired immensely, as the Nihilanth's actions serve as the catalyst that led to the Combine's discovery and subsequently invasion of Earth. In truth however, the Nihilanth and its Xen forces wasn't expanding, but merely running and fleeing from the Combine, and saw Earth as a new sanctuary, to hide from the ones they fear. In the eyes of the humanity, these Xen creatures were invading the Earth for the purpose of expansion of its species. Eventually, the Vortigaunts, another species that were victims of the Combine's brutality, escaped to Xen as well, and the Nihilanth enslaved and forced them under its bidding.ĭuring the events of Half-life, during a resonance cascade event which occurred in the Black Mesa Facility located on Earth, the human home world, the Nihilanth saw this opportunity and took advantage of the quantum event and sent its slave army across into the human world. The Nihilanth itself was the only survivor, and it and its minions managed to escape into the border world, Xen, where they barely managed to survive in a new ecosystem. It eventually ended with Combine being victorious and the Nihilanth's kind being hunted down to near extinction. What followed was a brutal genocidal campaign against the Nihilanth's species, as the Combine mercilessly invaded their world. The Nihilanth's species appears to be an alien race of powerful beings, almost god-like in nature, as evidenced by the characteristics of Nihilanth himself.ĭuring an unknown period of time, the Nihilanth's species came into contact with an immensely powerful interdimensional empire known as the Combine. The Nihilanth is a member of a powerful species that hailed from beyond the Xen dimension, on their own home world in their own universe, long before the Black Mesa Incident. In addition, the Nihilanth also wears metallic wristbands similar to those worn by enslaved Vortigaunts. It has unusually long arms, huge hands, and disproportionate fingers. Underneath its third arm is a surgical scar that goes down its abdomen, which may very well have been a result of experimentation from the Combine. Like all of the other sapient Xen species, it has 3-fingered hands, multiple eyes, and a third appendage protruding from the middle of its chest. Its head is so large that it must be kept upright with a small cord/string that extends from the base of the spine to the back of the head. The creature's minuscule legs appear either to be vestigial or the remains of amputation, as the Nihilanth relies on a levitation device for movement. Physically, the Nihilanth resembles a gigantic, abnormally proportioned brownish-gray (pink in some lighting instances) fetus with a massive head atop a smaller body.