Here is a promised episode talking about making audio tracks for games. This is a primer on my process. This is specifically for tabletop and larp gaming. I make no claims about being a great expert, but it is something I enjoy doing.
Some resources I talked about.
https://freesound.org/
http://audacityteam.org/
http://www.adobe.com/products/audition.html
http://www.apple.com/mac/garageband/