Inside of Google's HR portal you van view everyone's basic information / org chart, additionally you could view achievement badges. These badges were created by Googlers, and distributed by Googlers (via various APIs). Additionally there were API's to query users and what badges they had, so there were various leaderboards.
These badges were pretty absurd (and fun!), if you came in via an acquisition you would have the "Original X company gangster", if you created a code change and your PR / CL number had any Yahtzee combination in it you could get a "2 of a kind", "3 of a kind" etc... badge. if you got "N badges" you would get a badge...
The api for creating & distributing badges was pretty loose, and collecting badges was very fun! You basically just needed and idea, an icon, and a way to distribute!
I highly reccomend game'ifying HR! It's a lot of fun!