Account Linking

This guide explains how to link accounts in games and web services.

This feature is a means to enhance user login convenience, and linking is optional for the user.

What is Account Linking?

Account linking is a new feature that supports maintaining a single game data across different accounts without distinction.
- The linked accounts will share one player ID.
- However, upon first login, if the user logs in with a different IDP that has the same email information as another IDP for the same game, a separate player ID will be created.
  - Currently, on mobile game platforms, logging in with different IDP information on the same app is recognized as creating a different player ID.
Depending on the game service policy, linking between different IDPs can be provided.

The IDP to be linked must be in a state where it can log in successfully.
The player ID must not already exist for the same game (including cases where the account is in a withdrawal pending state).
The account must be in a normal status.

Linking between identical IDPs is not allowed.
Re-linking to the same IDP (not the actual account, but Google IDP to Google IDP) within 7 days of unlinking is not allowed.
Linking is not possible in case of partial account mismatches.
- Linking is not allowed between countries if the information differs (for global services, to prevent abuse).
- Linking is not allowed in case of CI mismatches (if applicable; not applicable to mobile).

[Ingame] Settings > Account
- After logging into the game, access the account-related menu from the game settings.
- Display the list of IDPs allowed by the game launch policy.
- Select the IDP to link > log in to the IDP > agree to the third-party information provision by the IDP then linking is complete.