Saving game data to a file

Reference: Saving Game Data with Unity The link contains a very good article on saving game data. I was able to save an entire list List of challenge objects. Read, write and update worked as expected. My suggestion would be to create a simple class as suggested to make sure it works first and then add objects as needed. I initialize a default list of objects if one does not exist using a string[] list of challenge names and then use updates to update each object as the game challenge completes. There was a comment reference on using json but I did not look into it yet, so I cannot say which is better or more secure per the reference.