Game Center usage
Earth Defense uses Apple Game Center to authenticate player identity through Apple and to provide supported game features. It does not create a separate Earth Defense account.
Authentication is handled by Apple. Earth Defense uses Game Center data only for the relevant gameplay features and not for advertising, third-party profiling or creating an independent user account.
Sign-in flow
When appropriate, the game may present Apple's Game Center sign-in interface. This interface is provided by Apple. If a player dismisses the sign-in screen, iOS may temporarily limit when it can be shown again. The in-game “Try Again” option provides another way to request authentication when the system allows it.
Information used
When Game Center is enabled, GameKit may provide the local player's authentication state and platform data required for Game Center features. Earth Defense does not use this data to determine a real-world identity or create an advertising profile.
| Information | Purpose | Transferred to an Earth Defense server |
|---|---|---|
| Authentication state | Determine whether Game Center features are available | No |
| Game Center player identifier | Distinguish the player within Apple's GameKit context | Not transferred to a separate developer account in the current version |
| Alias / profile information | Display the player in Apple-permitted Game Center interfaces | Not stored for advertising or independent profiling |
| Score / achievement data | Operate enabled Game Center features | Managed through Apple's Game Center infrastructure |
Playing without Game Center
If Game Center authentication fails, is dismissed or is declined, the core Earth Defense gameplay remains available. Features that rely on Game Center, such as supported scores or achievements, may remain unavailable until the player signs in.
Account and privacy management
Game Center is part of the player's Apple Account. Users can manage Game Center authentication and related settings under iOS Settings → Game Center. For broader data information, see the Privacy Policy.