Open Source Crowd Sourcing Game Platform: “Metadata Games (MG) is a free and open source (FOSS) crowdsourcing game platform. As players play Metadata Games, images, video, and audio from libraries, archives, and museums gain valuable descriptions, making it easier for the general public and scholars to discover these collections. The current MG build we are hosting contains over 45 Collections from 11 Institutions, containing tens of thousands of media items (images, audio, video) that have generated over 167,000 tags. Our current collaborations include the British Library, Boston Public Library, The Open Parks Network, Digital Public Library of America, and the American Antiquarian Society, among others! For more technical information, check the Technical Implementation section.”