PlayerPrefs. This will always set it as 1. That means when you lookup a number using PlayerPrefs. GetInt , you will either get 1 (the number you set inside of UnlockLevel , or 0 (not set). The reason 0 is returned when it isn't set, is because 0 is the default value (docs).

Here's where PlayerPrefs data is typically stored on different platforms: Windows: Data is saved in the registry under a subkey of HKEY_CURRENT_USER\Software\[CompanyName]\[ProductName] , where [CompanyName] and [ProductName] are the company and product names you've set in your project settings.

PlayerPrefs is a class that stores Player preferences between game sessions. It can store string, float and integer values into the user's platform registry. Unity stores PlayerPrefs in a local registry, without encryption. Do not use PlayerPrefs data to store sensitive data.

On Windows, PlayerPrefs are stored in the registry under HKCU\Software\[company name]\[product name] key, where company and product names are the names set up in Project Settings.