To update your game, go to the Google Play Store, enter the “Updates” section, and then update The Sandbox by clicking on it. If a message "Package File Invalid" pops up, g o  to your device's  s ettings  menu.  Then, g o to  Applications  (may also be labeled  Application Manager ).  Tab over to  All Applications .  Open the  Google Play Store  app.  Tap on  Clear Data  and  Clear Cache .  Relaunch Google Play and install or update our game again.