Badge(r)s!: a geolocation-based game built on OSM data
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Badge(r)s!
https://www.badge-r-s.de/
Free casual GPS game about creating, sharing, collecting and distributing virtual swag in the real world. Join, shape your environment, play with us!
it's a bit rough in the ui/ux department and requires a google account but i had fun testing it today. you walk around to "produce" badges, which you can then "drop" wherever you are to make claims on map quadrants
found via https://weeklyosm.eu/archives/17334