I just seem to be inquisitive. Does anyone here has every single badge?
Here is the hidden badges page
If you want to check for all the badges, access the Users on the page's menu then click on each user. Most of the badges will be listed. Usually, the top users have most of the badges that can be achieved. If you want to know how to meet the qualifications for a badge, just hover one badge with your mouse and the description will appear.