5 Game Mechanics Google+ Gets Right | Badgeville Blog: On Gamification, Analytics and Loyalty | The Google+ Project | Scoop.it
Game mechanics, applied smartly, drive us to want to perform certain behaviors. The most buzzed about application on the web right now, Google+, must have a gamification strategist on board, as it has a variety of game mechanics that are helping make it a fast-growing success.

Here are 5 of the most noticeable game mechanics that they’re using for their early experience:
1. Limited Access
2. Fill Up Your Circles: Onboarding a New Concept
3. Circles: Are You In or Are You Out?
4. Instant Gratification: Real Time Feedback
5. The +1 in Google+