Today Square Enix has announced Crystal Conquest, which is currently set to release this summer. The game will be a free-to-play title released in Japan and will be powered by Yahoo Games. The game is said to support up to 20 vs. 20 battles, with the pre-release build set to support up to 12 vs. 12.
Currently, a test period is planned for the time period of April 12-16, 2012. with recruitment due to take place between now and up until April 9th.
To check out the release trailer and other info for the newly announced game, check out the official website.