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"In Ravenholm, you do be vigilant."
Father Grigori[src]

The Fast Headcrab is a Headcrab subspecies previously unknown before the Combine invasion.


The Fast Headcrab looks much slimmer and more agile than a normal Headcrab, having thinner, spindly legs, smoother, lighter bodies and no visible mouth-parts. Fast Headcrabs share many of the vocalisations of the standard Headcrab. Examined up close, Fast Headcrabs have wart-like bumps on their skin. The legs of a Fast Headcrab also have elongated claws, which serve as weapons as well as a means to latch on to surfaces, where they then wait to attack unsuspecting prey. This is seen in Half-Life 2: Episode One, Lowlife. They drop off when the player gets too close or shines their flash-light on them. Fast Headcrabs have been seen being cooked by Vortigaunts, apparently as food.

The Fast Headcrab is first seen at Station 6 in the beginning of the Half-Life 2 chapter Water Hazard. When going back to Arlene after leaving with the Airboat, she appears to have been killed by the only Fast Headcrab of the area, although it did not turn her into a Fast Zombie. Fast Headcrabs are later seen being cooked in the All-Knowing Vortigaunt's cave near the dam before Black Mesa East. Fast Headcrabs are not officially seen again until Ravenholm.

Behavior and skills

The Fast Headcrab attacks in much the same way as a normal Headcrab, and does about the same amount of damage. The main difference is that Fast Headcrabs close the distance between themselves and their target very quickly before proceeding to leap at the target frantically. Their speed and unpredictable movement patterns make them difficult targets, and they can be very dangerous in groups of three or more.

Fast Zombie

Main article: Fast Zombie

Like all other Headcrabs, Fast Headcrabs can latch onto a Human's head and take control of their nervous system, creating a mindless 'Zombie' that submits to the will of the Headcrab. Fast zombies have a number of key differences to Standard Zombies, including increased speed and agility, and they are also able to jump, unlike normal Zombies.


Fast Headcrabs can be defeated with the same tactics as Standard Headcrabs, but their attacks are slightly more powerful and their agility makes them harder to hit. In higher difficulties, automatic weapons, such as the MP7, are surprisingly effective due to their constant impact on them.


List of appearances


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