Zombie, Half-Life Wiki

A Zombie is a common enemy featured in the Half-Life series. It is the result of a Headcrab attaching to the head of a human and taking control over its victim's body, this incapacitates the host, and renders them a "Headcrab Zombie," or a "Necrotic", as they are referred to by the Combine Overwatch. Ordinary Zombies are often referred to as Standard Zombies to distinguish them from the other types of Zombies, such as the Gonome, the Fast Zombie, the Poison Zombie, the Zombine, and the Armored Z

Half-Life – Wikipedie

Zombie, Half-Life Wiki

Ravenholm - Wikipedia

Headcrab zombies - Half-Life Wiki - Neoseeker

Jeff - Combine OverWiki, the original Half-Life wiki and Portal wiki

Gargantua - Combine OverWiki, the original Half-Life wiki and Portal wiki

Zombine - Combine OverWiki, the original Half-Life wiki and Portal wiki

Locations of Half-Life - Wikipedia

2001 Zombie and Headcrab Remakes

Is the host really still alive? I've heard two sides of the argument so is there any official confirmation or evidence, other then the reversed screams, that the host is kept alive

Zombie, Half-Life Wiki

Enemies - Half-Life: Alyx Guide - IGN