General plugins (Local): Open Badge Factory
Jouni Suorsa, 
Leo VainioOpen Badge Factory -plugin
Open Badge Factory is a cloud platform that provides the tools your organization needs to implement a meaningful and sustainable Open Badges system.
With the local_obf plugin you can issue Open Badges created in Open Badge Factory. To use the plugin, you need an account on https://openbadgefactory.com (You can register for free, see https://openbadgefactory.com/faq for details about different service levels).
Post install
To connect to Open Badge Factory, the plugin needs a request token or API key.
To generate the required API key, log in to Open Badge Factory.
When logged in, navigate to Admin tools > API key.
On the API key -page click on Generate certificate signing request token.
Copy the generated token into OBF Moodle plugin settings,
in Site administration > Open Badges > Settings.
Also take a look at the separate displayer block plugin!
Useful links
Screenshots
http://integration.moodle.org/job/Precheck%20remote%20branch/14320/artifact/work/smurf.html
Thanks Jouni for sharing this plugin with the community, and sorry for the delay in the review and approval process. The code looks sane and cleanly structured, well done on that. You are cleared to land now, welcome to the Plugins directory!
Thanks
Currently that is not possible from within the moodle plugin/environment. However you could create a Milestone badge in openbadgefactory.com, and set the badge to be awarded after X amount of select badges. The Open Badge Factory would then issue the milestone badge when X amount of badges have been issued through the plugin and/or other methods.
Just to confirm.. Did you first generate the API key at https://openbadgefactory.com/c/client/my/edit2/apikey and copy paste it to the plugin?