I basically had way too much time on my hands thanks to COVID-19, so I updated this pack. It's been nearly 6 years since the last update.
I discovered a lot of things I missed by installing this pack on Half-Life: Source and listening to how close it was to the original Half-Life experience.

Release notes:
* Made tile footsteps occasionally "squeak" like they do in Half-Life and Half-Life 2.
+ Added lots of physics breaking sounds that I missed. This includes:
* Cardboard
* Metal
* Glass
* Concrete
+ Added bullet impact sounds for most surfaces.
+ Added footstep sounds to different types of physics objects, including wooden crates.

Just made a few subtle changes. Three words: buttons and doors.

Sorry this took so long to add. Shortly after I made the changes my computer went crazy and I had to reboot twice(!).

Anyway, here are the changes:
Added Gravity Gun sounds. They are the Tau cannon sounds. Thanks, The Madgamer Ned's Atomic Dustbin!
Switched the SMG to use the non-HD sounds, and made the AR2 use the HD SMG sounds. Also thanks to The Madgamer Ned's Atomic Dustbin!
Changed crowbar sounds to HL1 sounds. Thank for the help, Nightstalker!
Changed the stock HL2 button sounds to the WON Half-Life Launcher sounds. Now the main menu and the spawn menu sound different [from each other]!
Changed the ammo pickup sound to be the AMMO pickup sound from HL1, not the WEAPON pickup sound from HL1.
Accidentally fixed the SMG1 grenade sound!

I believe I have forgotton one or two things, but I'll just get to the next update. The next update will have most if not all of the button sounds replaced with originals, and a few other small changes!

EDIT 05-18-14: I added some clarification to certain things. Look for "[text here]" in the change notes. And to Ned's Atomic Dustbin: I can't keep updating your name, you know!

Added: wood and glass breaking sounds, wood, glass, and dirt bullet sounds, teleport sounds, object scrape sounds, and headcrab sounds.

Initial release.