Half Life 2
Half-Life 2: Extreme Mod Skin Pack For Regular Half-life 2
This is a skin pack from the single player mod, Half-life 2: Extreme. These replace your default Combine NPC's and weapons from regular Half-life 2 and it's mods with those from the Half-life 2:
Extreme mod. It's even has the sounds from the mod also. See the readme below for credits and installation instructions.