High-poly mercenary models from Unreal Tournament 2004. If you need 250 fps or more, these models may lower that number; otherwise, feel free to install them. They look really nice. All the models were carefully converted for HL by Koshak, so there won't be any problems with animations.
Installing the models:
Copy the contents of the archive into the valve or valve_russian folder
If you don't know how to install models, go here - Installing Half-Life models
Download mercenary models for Half-Life