666 in their logo and it looks like they support plug ins from a lot of different video game servers
https://twitter.com/impidgin/with_replies
https://pidgin.im/plugins/?publisher=all&query=&type=
pidgin was started by mark spencer. it started out as Gaim. he also developed "the world-wide phenomenon known as Asterisk, the open source PBX". hard to find much else on him.
https://en.wikipedia.org/wiki/Mark_Spencer_(computer_engineer)
http://conferences.oreillynet.com/cs/etel2006/view/e_spkr/2472