FutureSack Let's Play Half-Life v0.52 Alpha (1997)

Redditor "jackaljayzer" uncovered this little gem of gaming history and managed to get it working, before posting it online for all to download.
This alpha build of the original Half-Life is basically a tech demo, showing off the new (for the time) technologies Valve had developed for the game. There are some familiar faces and sounds, while you can see the genesis of others and some things that were removed entirely.
Gameplay footage (if you can call it that) by yours truly. Apologies for crackly audio, my CPU doesn't like Fraps.
Half-Life (C) Valve Corporation 1998.
"FutureSack Let's Play: Half-Life v0.52 Alpha (1997)" (C) FutureSack 2013.
Gaming, science and tech news at: www.futuresack.com

[@ConnorGardner]

Excuse me, but how did you get there? All I got was the multiplayer