I'm in the middle of working on a video, and I wanted to get some voice clips from a handful of Steam Games. Unfortunately, a google search mostly came up with using WinDirStat, which isn't really that helpful, especially when the sound files are hidden and/or encrypted. So, I wanted to see if anyone here(I'm guessing Cody? ;-)) would have any knowledge on how to do that, other than just turning down sound effects and hoping I get lucky.

You have a few options:

1. If someone has created a tool to extract sounds for the particular game, use that.
2. Turn off all sounds but the voice from in the options menu of the game and record.
3. Record in surround sound and just use the center channel, which is usually voice only

You may get lucky though. I just opened a game I had here on OS X by right clicking and doing "show package contents". Exploring the subdirectories, there were just .wav files for a lot of sounds.