Inspired by ITEM's crowbar mod and FennecHand's HEV type beat replacement.
Each PAK replaces the sociopath music with HL1's Diabolical Adrenaline Guitar, Nuclear Mission Jam, or its closing credits depending on which you install. Install one at a time.
And huge thank you to ZeroZM0 for their guide and additional help with stuff like the filter on the third person audio files.