Metadata Games, the National Standard open source crowdsourcing game platform, is used with over 45 Collections represented at 11 Institutions. It includes tens of thousands of media items (images, audio, video) that have generated 167,000 tags, with even outlier images garnering nearly 100 tags each.
Descriptive metadata cannot be generated by computers, as it’s dependent on what’s in images, audio files, and videos. Adding metadata is prohibitively time consuming for individuals or small institutions with large media collections. Metadata Games allows you to harness the power of players to easily enhance information about your collections.
Further reading: http://www.metadatagames.org