I've wanted to do this mod for my liking and it is also nice to Half-Life Alpha. And so I ported models Half-Life Alpha, but maps the'm redoing.
A new mod addon has been uploaded. Enjoy! :)
Update 1: Little update for fix the texture of the shotgun.
This fix will be added to the main mod, so if you want the shotgun fixed you need to redownload the mod 0.7 Update 1.