Foursquare has announced that it's launching its location-based social networking game in London.

The service, which awards points and badges for experiencing things in certain locations, is popular in the States but relatively unknown on this side of the Atlantic.

Apps to play are available for iPhone and Android, and there's a web interface for other devices.

Over here, the only other city where the service is available is Amsterdam. London has a reputation for being open to social services, so Foursquare could do well in the town. Particularly as there's plenty to see and do in the capital.

Meanwhile, the company has also attracted investment from Digg foundeer Kevin Rose. He announced that he was involved in the service at the Future of Web Apps conference which co-incidentally was also held in London.