The folks at Wikipedia found it best for the site to delete the list of foursquare badges. I found it useful in helping me aim for my next badge… and @cipriani15 asked, so I had to help! Below you can find a PDF of the page as well as a link to the cached page from Wikipedia. Enjoy.
Special hat tip to Tony Felice for having built this list.
List of foursquare badges on Wikipedia (cached)
List of foursquare badges on Wikipedia (pdf)