The models and materials for an enemy type in the game. These models are also available for download on the Garry's Mod workshop. Please read the text file that I have included in the download for more information :)
These models can be placed in the gamefolder of most source games, and can then be found in the asset browser. To use the models to replace combine soldiers (eg. to test them as NPCs) simply rename the model files to match the combine_soldier models found in hl2/models. These models are also available for download as NPCs from the Garry's Mod steam workshop. Please do not replicate or redistibute these files without my permission. Contact me if you find a problem :)
