Some players are receiving an "Error -2” message when attempting to install Terraria from Google Play. We have determined that this is likely related to your version of Google Play Services, so please do the following to update it:

  1. Update Google Play Services on the device 
  2. Open the Play Store at least once and install/update Terraria
  3. Terraria should successfully update

Also, this link has potential solutions to other Google Play-related error messages: