This crab creature has a unique parasitic strategy

ASSCRAB - this Headcrab is THHHHIC. From Half-Life. We finally know why Lamar went missing

Hi-Poly 3D model - meant for 3D printing only

Have you ever seen such a magnificent species? These 'crab' creatures can completely control their host's nervous system. Can you imagine what the next stage of mutation looks like?―Black Mesa scientist[src]

Headcrabs are omnivorous, parasitic alien organisms. These creatures have made appearances in a majority of releases on titles based on the Half-Life universe. Thanks to this, and the fact that they spawn frequently through the course of the story line, these little creatures are guaranteed to be engraved in the heads of users who play one or more Half-Life titles. This has led the community into considering the Headcrab as one of the most iconic creatures in the Half-Life universe.