Why go through the trouble of sideloading? Here are the standout features of the version:
To play the game offline, you typically need three components: the (the app installer), the OBB (the game assets/data), and occasionally a "Data" folder for specific updates. Download Fifa 13 Apk-obb Offline
You need both files. Installing only the APK will result in a "Download Failed because you may not have purchased this app" error. Why go through the trouble of sideloading
This usually means the OBB folder is in the wrong directory. Ensure it is inside Android/obb/ . the OBB (the game assets/data)
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