OpFor H.E.C.U. Voice for Vanilla HL1 (Blue Shift support added!) addon

This addon replaces vanilla Half-Life 1 H.E.C.U. Grunt sounds with Opposing Force ones, note that grunts' lines won't have as much variety as vanilla.

HOW TO INSTALL:

Place the "valve_addon" folder in Half-Life root folder, launch the game, select Options, then select Video, then turn on "Allow custom addon content", press Apply, the mod should reboot itself, then press OK, and you're ready to go.

12/02/2021 update, added Blue Shift support

To install it for Blue Shift do the same thing, place the bshift_addon folder in Half-Life root folder, launch Half-Life: Blue Shift, select Options, then select Video, then turn on "Allow custom addon content", press Apply, the mod should reboot itself, then press OK, and you're ready to go.

Credits:

Gearbox

SpookyTheCuteGhost (for archiving my Blue Shift patch)