does someone knows of guitar sheet music site.

http://www.classicalguitarschool.net/en/ has a lot of sheet music all arranged for guitar.

What are you looking for in particular? That site doesn't have any anime and game sheet music however...

I have been meaning to write something like this on my website and you have given me an idea. Your post will be rather good.

IF you want tabs for guitar/bass/etc. you can try ultimate-guitar.com

I always used tabs on http://www.songsterr.com/
I loved how you could hear a preview off what you are learning to make sure it isn't a bad version.

Sorry if you're more into sheet music, I don't have any place for guitar sheets.