Their backs are covered with thick armors, protecting them from enemy attacks. However, to counter their strength as a deadly parasite, their undersides have been made vulnerable as compared to other forms of Headcrab species. They can be finished off with one blow of a strike in these areas.Īll of the Headcrab species serve one purpose destroy human lives by turning them into zombies on the order of the Combine. Another point to be noted here is that all of the species of Headcrabs differ in size and survival tactics too.

For example, Standard Headcrabs were the smallest in size. They had visible teeth and stomach and could be destroyed by being exposed to toxic environments. The Standard Headcrabs possessed the ability to survive deep waters. On the other hand, Headcrabs in Half-Life 2, The Fast Headcrabs and The Poisonous Headcrabs namely, had reversed characteristics. Both of the species that were introduced in this installment were far greater in sizes, could not survive deep waters but could live through toxic environments.

Thus, the later remodeled versions of Headcrabs species which were introduced in the second game were far stronger and scarier than the ones in Half-Life 1.

In the Half-Life game series, Headcrabs’ primary targets are humans. However, they are themselves the target of other species such as Bullsquids and Vortigaunts. As the story rolls out, it is shown that despite their predatory nature, Headcrabs can be tamed and domesticated too.

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