You download a save with 500 red tickets. You paste it. The game loads, but Bunker Alfa resets to level 0, and your chopper disappears. Why? The save’s event timestamps no longer match the server’s clock. The download "worked" to load the map, but the data is functionally broken.

The official method uses Google Play Games (Android) or Game Center (iOS). If your settings menu shows a "Disconnect" button, your data is currently backed up to the cloud.

Copy this entire folder and paste it into a safe location, such as your Downloads folder or an SD card. Restore Progress: Install the game (but do not launch it yet).

Some players share their own backed-up save files online, promising unlimited resources, max levels, or unlocked blueprints. Others look for "100% complete" saves to skip the grinding.