TheGamesDB.net API: TheGamesDB.net is an online database for video game fans and enthusiasts. The site serves as a frontend service that is linked to a database of video game metadata and high quality artwork.
The database of artwork and metadata can be incorporated into various home theatre PC (HTPC) software and plug-ins through their API. You can search for specific games or a broader list of games, retrieve artwork file locations for found games, update favorites and user ratings and request new or updated content by specified dates. Requests are made through a GET request to the REST API with responses in XML (future plans for JSON).