ガンホー・オンライン・エンターテイメント
Emil Chronicle Online (), often referred to as "ECO", was a massively multiplayer online role-playing game created by Headlock and published by GungHo. It was first released in Japan on November 24, 2005 for Microsoft Windows. Gravity purchased the worldwide distribution rights for all regions except Japan from GungHo Online Entertainment Inc. in November 2005.