Ingress. But that silence has broken: A new update is rolling out and should be available to all players in the course of a few days. This update includes scanner performance updates as well as a new system of badges that players can earn to show off their achievements. This new achievement system -- not unlike the famous merit badges earned by scouts -- awards players for such things as exploring, building, and hacking. Ingress also recognizes players for more unique achievements with such badges as Mind Controller and Seer.
[Thanks to SpaceCobra for the tip!]