If you are using an Android phone, than your account will automatically be linked with Google Plus.

However, if you lose your Google account or change to a device that does not support Google Plus (iOS), you cannot bring back your data. So please use the additional Facebook or email link.

■ How to Link Account

- [Turn on Game] > [Captain Profile] > [Settings] > [Account] > [Link Account] > [Google/Facebook/Email]