2011: With this first study we investigated crowdsourcing using a serious game concerning the annotation of semantically rich features of Mars. Photographic data is used transmitted from the Mars Reconnaissance Orbiter recording the surface of Mars.
A computer game, called Cerberus 1, was developed allowing players to tag features of the Mars surface. The game investigated what the effects were of different help levels to support knowledge transfer and different levels of game features to provide the players with a stimulating game experience.
Results from this stuy nowadays still are the foundation of BlackShore's technology enabling the crowd to help solving problems in the world using satellite imagery.
Nice to know is that Cerberus 1 can still be played in two versions here: