Before there were The Specialists, there was a generally unpopular mod called Action Half-Life. It had great premise and a lot of work went into it, but a lot of features did not play well.
I still enjoyed the game while it lasted, and I felt bad that all those great player models that were made for the game were forgotten.
Now a large number of those players can be used with Sven4.0's new animations, including but not limited to, Arnold Schwarzenegger, Antonio Banderas, and Keanu Reeves.
I did not include several players, one being Snake Pliskin, as I didn't want to have to bother with changing everything so it won't conflict with Solid Snake, or of course, Pliskin.