SFZero

SFZero players earn points by completing a wide variety of different tasks, often with a focus on creativity, exploration, community, or performance.

Although the game was originally intended for San Francisco residents, its player base has expanded to include many other locales both in and outside of America.

[1] SFZero is the creation of Ian Kizu-Blair, Sam Lavigne and Sean Mahan of Playtime Antiboredom, a "nonprofit organization dedicated to producing free immersive art games that use new technologies in significant ways.

For example, the description for the event "The Sweet Cheat Gone" reads: An investigation of guilt and innocence played out across the streets (zones of desire and exchange) of San Francisco.

You are a prosecutor, a private eye, a witness, collecting evidence, not knowing who you can trust, betraying your friends (enemies) to build your case.