So back in 2015, there were these voice lines eventually leaked with HL:A's Day One build. They were most likely a dev messing with a basic vocoder, with most of the lines from the base game recorded.
They are very basic, with barely any variation of names and are generally meh and are obviously temporary.
I've rewritten the scripts to use these lines and use these sounds. Note that there were a few other sounds reused from the developer HL:A metropolice lines IE the pain and death sounds.
I've also included VPKs that you can choose containing different editions of the voice lines you can choose, like "Only Metropolice" or "Only Soldiers" and of course both of them.