Corrected version of the full release "They Hunger: Source"
How to install:
1) Install Half-Life: Source and Source SDK 2013 Singleplayer on Steam
2) Place the folder "theyhunger" from the archive into the directory
--> /steam/steamapps/sourcemods/[here]-Restart Steam-Find in the library "They Hunger: Source" and run it.
Enjoy
Original author
Neil Manke
Sadly still nothing for me bud, I've given up now after trying everything I can and even things I hadn't thought of before, but anyway, I wish you good luck with it all, it's a great project and undertaking and you can be proud of that.