Lacking any internal organs or skin, those zombies can easily jump over enormous distances, climb walls or attack with extraordinary speed, while being just as resilient as the normal zombies, taking at least two shotgun shells before dying. They only appear in the expansion 'Half-Life: Opposing Force'. They are tougher than normal zombies, but rarer. Their claws are elongated, and the mouth in the chest has fully developed, with real, sharp teeth created from the host's ribs. Additionally they can throw the objects and when taken enough damage the standard headcrab with detach from the head and attack on its own.Īfter some time passes, the host is mutated even more heavily by the parasite, becoming a 'gonome'. The zombie can be also cut in half with a sawblade and will continue to crawl towards the prey.

Otherwise, with liberal application of explosives, or careful use of a crowbar, they are not a big problem. While a single zombie isn't a real threat, a mob of them is extremely dangerous, if one finds themselves surrounded. The chest is opened, forming a 'mouth' with ribs used as teeth, and the hands are transformed into claws, used to rip apart the prey. The standard zombie is created by a standard headcrab latches onto a suitable host. Depending on the host, type of headcrab, and time since infection, five different kinds of zombies may be created. While the headcrab controls movement, the host, still conscious, can feel what their body is doing, scream in pain especially when set on fire, or beg to be killed. Zombies are created when a Headcrab attaches to the head of a suitable host and takes control over its victim's body, rendering the host a 'Headcrab zombie,' or 'necrotic', as they are referred to by the Combine Overwatch.

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