PrefCrypt is an extension to PlayerPrefs that adds an extra step of security along with extending the amount of variables able to be saved.
Documentation: Here
Forum: Here
Variables Include
String , String [ ]
Int , Int [ ]
Long , Long [ ]
Float , Float [ ]
Bool , Bool [ ]
Color , Color [ ]
Vector3 , Vector3 [ ]
Vector2 , Vector2 [ ]
Double , Double [ ]
DateTime , DateTime [ ]
Transform , Transform [ ]
Quaternion , Quaternion [ ]
Vector4 , Vector4 [ ]
Games will never be completely cheat proof. However, you can keep adding protection. PrefCrypt aims to help keep these values secure while helping with PlayerPrefs shortcomings.