Your attention - zombies from the first Half-Life, namely the model of this monster from a single game. The fact is that the zombie model in single player and multiplayer has noticeable differences. Of the two, I chose zombies from Half-Life's story mode. This skin was made on the basis of Claude's skin, I tried to make it on other characters - it turned out not very cool.
Installation: Throw zombie hl1.bmp into the skins folder, which is located in the directory with your GTA 3.