Konami’s announced that as of the end of March 2012, it had 20 million registered users playing its social titles. The most popular of the lot was the card game Dragon Collection with over 6 million registered users, followed by Sengoku Collection with over 3 million users. Other titles in Konami’s social catalog include: Star Wars Collection, Pro Baseball Dream Nine, J. League Dream Eleven, Hisho Collection, Dream Stallion, and Attack on Titan. Thanks, Siliconera.