## Where do Headcrabs come from?
In the world of the Half-Life video game series, Headcrabs are alien creatures that originate from the planet Xen. These parasitic creatures attach themselves to the heads of their hosts, taking control of their nervous systems and turning them into zombies known as Headcrab Zombies.

The origins and nature of the Headcrabs are not fully explained in the games, but they are believed to be part of a larger ecosystem of dangerous and hostile life forms that exist on Xen. The creatures on Xen were first encountered by humans during the events of the original Half-Life game, when an experiment at the Black Mesa Research Facility caused a rift to open between Earth and Xen.

Despite their small size, Headcrabs are one of the most iconic and memorable creatures from the Half-Life series, and they have become a staple of the franchise's lore and fan culture.
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