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

Zombie Poison, Half-Life 2 Cut Npc's Wiki

Npc zombie - Valve Developer Community

Zombie, Half-Life Wiki

Half-Life – Wikipedie

Zombie, Half-Life Wiki

npc_fastzombie - Valve Developer Community

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

Combine Hazmat Worker - Combine OverWiki, the original Half-Life wiki and Portal wiki

headcrab Coolvibe - Digital ArtCoolvibe – Digital Art

Zombie, Half-Life Wiki

Archer, Half-Life Wiki

Ravenholm - Wikipedia

PC / Computer - Half-Life - Zombie - The Models Resource

Alien Assassin, Half-Life Wiki

Zombie Panic! Source - Combine OverWiki, the original Half-Life wiki and Portal wiki