The esf_default_sounds.zip file you have requested: Mods / Multiplayer / Earth Special Forces / v1.2.x / Backup Files / Earth's Special Forces Default Sound Pack - 23.58mb is not available. Perhaps try browsing all files for the game Half-Life and upload any files you want to share or are missing. This is the only information we could locate:
Default soundpack for ESF. Usefull if you've replaced a sound and would like to go back without reinstalling.