Foursquare with RunKeeper introduce the first badge you unlock by doing something, not just checking in. Here's how it work: "users of RunKeeper app that helps you track your fitness routines, can now earn RunKeeper-exclusive badges on foursquare by achieving different milestones within their app. For instance, if you run a marathon using RunKeeper, you'll unlock their Marathon badge. Once you unlock a badge, it show up on both your RunKeeper profile and with your other badges in foursquare," explained Foursquare.
To continue promoting this behavior, we're going to develop more of these badges unlocked by real-world experiences with a handful of carefully selected partners, a few more of which'll be announced soon.