I made this for Halloween 2012 and I totally forgot to upload it here, oops. OH WELL HERE IT IS
This song is also known as 博識であるが故、狂気 or "Wide knowledge of the late, madness", though that's apparently a mistranslation. It actually means something more like "I have gained extensive knowledge and have therefore gone mad". At least, that's what I've been told. :B
Unfortunately publishing the file with full audio quality completely ruins the timing of everything near the end which is kind of important, so it's not as high as it could be. You can watch the <a href="http://www.youtube.com/watch?v=g7iZ3cZqai4">youtube version for better audio quality</a> if that really bugs you though.
All original characters in the L4D universe again. Hunter and Smoker are mine, Jockey and Charger are <a href="http://www.jazaaboo.com">Jazaaboo's</a>.