What is an obb file and how do I open an obb file?
OBB, or Opaque Binary Blob files are used by some Android apps sold on the Google Play online store. Developers create OBB files to contain and bundle larger assets using the JOBB tool for Android SDK. They hold additional encrypted format data not stored in the main application package, including graphics and media files. They can be uploaded with the APK file using the Google Play Developer Console. Users who download the app will receive both the APK file and the APK Expansion File containing additional OBB asset files.
Relevant obb file links:How to open obb file on Youtube
How to open obb file on Wikipedia
How to open obb file on Microsoft.com