Follow the steps below to link your account.
 
[Linking after Your First Login]
 1. Select [Sign in] from the loading screen.
 2. Select Google, Game Center, or Apple ID to sign in.
 3. Choose the account you want to log in with.
  ※ The options may vary depending on your OS.
 
[Linking During Gameplay]
 1. Select the Menu button at the top-right corner.
 2. Settings → Link account
 3. Choose the account you want to link [Google, Game Center, Apple ID]
  ※ We recommend you link your account to prevent data loss.
 
[Note]
 - An account that already contains game data cannot be linke