: If all else fails, try reinstalling the game. This can sometimes resolve issues with corrupted files.
Use fan-ported versions like Bad Piggies "Leading Edge" or the 2.3.6 Unity port . Bad Piggies 1.5.1 Activation Key Fix
If you're encountering issues with the activation key for Bad Piggies version 1.5.1, here are a few steps you can take: : If all else fails, try reinstalling the game