Half-Life 2: MMod Sound Pack
Replaces:
-Footsteps
-Misc player sounds (breath, bullet shell tink)
-Ammo pickup
-Flashlight
-Some physics sounds (mostly bullet impact)
-Menu sounds
NPC sound here
https://steamcommunity.com/sharedfiles/filedetails/?id=1607395166
Credits
Gunship Mark + HL2: MMod team – Original sounds
Me – All did was switch a few sound files around so they actually replace the original sounds