Clickers are the main antagonists of the video-game known as The Last of Us - although they are a part of the zombie apocalypse genre of horror they are technically not the living dead but are instead humans infected with a parasitic fungus that horribly mutates and eventually kills the host, while also stripping them of free-will. Clickers are blind but can track people down via sound - emitting a clicking sound from whence their name is derived.