I have an idea for a mod that is kind of based off of a mod I made for SWAT 4. In the mod the phsyics are set to be unrealistic/movie-like. For example: a shotgun would send a [killed] bad guy flying backward (further than normal). I wanted to something similar for L4D but am not sure exactly how to do so. I know that I can modify the gravity but not sure if/how to change how much "force" each weapon has, how to change the "force" of a melee attack or anything else like that.
If anyone has any suggestions or places that I can start looking, it would be appreciated.