This is just a small addon, uploaded on request, using content from my 'Sabrean's Headcrab Zombie Mod' Garry's Mod Workshop addon that improves HL2's zombies by changing the Classic and Poison Zombies into their Rebel Zombie variants, improves the detail and texture of the Zombine, and does a few other tweaks on the side. Full changes and install instructions are detailed in the description and the readme file. Please note that the full features from the Gmod mod, such as the multiple variants and randomiser, cannot be replicated in the HL2 games as they lack the lua code integration that Garry's Mod has. If you want randomised zombies, you will have to play the HL2 maps in Gmod.
To install, copy the 'custom' folder and all its contents to the appropriate main game folder of the game you wish to install this for. Merge files and folders if necessary.
e.g. copy to "C:\Program Files (x86)\Steam\steamapps\common\Half-Life 2\hl2\" for Half-Life 2
"C:\Program Files (x86)\Steam\steamapps\common\Half-Life 2\episodic\" for Half-Life 2: Episode 1
"C:\Program Files (x86)\Steam\steamapps\common\Half-Life 2\ep2\" for Half-Life 2: Episode 2
This small mod changes the models used by Headcrab Zombies to the improved versions from my 'Sabrean's Headcrab Zombie Mod' addon for Garry's Mod, which can be found on the Steam Workshop here:
The changes this mod makes to the Half-Life 2 games are:
-Changed all the Classic Zombie models to their green Rebel variants.
-Changed all the Zombine models to use the more detailed models and more accurate textures.
-Changed the Poison Zombie model to the Rebel variant.
-Changed all the Classic Zombie models, Zombine models, and Poison Zombie model to use tweaked ragdoll constraints.
-Added Headcrab bodygroups to the Fast Zombie Torso gib and the Zombine Torso gib.
-Gave all Zombies their Episode 2 animations. This normally doesn't make much of a difference, but it does mean standard zombies will flinch and Poison Zombies will use varying attack animations in HL2.