If you play Chain Chronicle outside of Japan, I got some bad news for you, it will be closed down next month, and the app has already been removed from the appstores. Before you go blaming SEGA, Chain Chronicle Global is actually published by Gumi and not SEGA.
This is the game closure notice they gave fans:
It is with heavy hearts that we must announce that Chain Chronicle Global is closing on February 29th, 2016.
It was a very hard choice to make, but despite the overwhelming support of our loyal fan base, it was the way it had to go. We appreciate your participation in what ended up being a very positive experience for us all, and we would like you all to know that it was thanks to you that Chain Chronicle Global made it as far as it did.
The app is to be removed from the stores, though you will still be able to play the game for a period of time afterwards. Sales of Prysma, however, will end on January 18th, 2016.
While Gumi dropped support, the franchise is far from dead. SEGA is planning to release a anime series based in the game’s universe this year and the game still gets updated in Japan. Maybe now that Gumi has dropped the title, SEGA Networks can relaunch it with all the same content the Japanese version has (the Gumi version was behind).