Let the World See the Carnage – Saving and Loading High Scores - Unity 4 Game Development - page 554

Saving and loading the local high score
In this section, we will be creating the LocalHiscore script, which we will use to save
and load the users' data. We will use PlayerPrefs , BinaryFormatter , and
MemoryStream to save and load the user data. Then, we will add the ability to save and
load the local high score to our UIHiscore script.