Black Mesa is a re-envisioning of Valve Software's classic science fiction first person shooter, Half-Life. Powered by Source Engine, You will re-visit the inaugural role of Gordon Freeman and his memorable journey through the Black Mesa Research Facility. Expect detailed environments to explore, a huge cast of characters and experimental weaponry. All-new music, voice acting, choreography and added dialogue give way to a more expansive and immersive experience than ever before.
This restores some unused visuals to the good ending for Black Mesa. To use, simply put this in the "custom" folder of your Black Mesa Steam directory. This is usually something like "D:\Steam\steamapps\common\Black Mesa\bms\custom", with whatever letter hard drive your steam is inatalled in substituting for D. The official map source files are in the Steam Workshop.
I don't know if it's because of all the other mods I have for this game, but the G-Man's lips don't move in that last sequence when I run this mod.
So sorry about this. I'd recommend looking to see if you have any conflicts.