I made a game with player prefs on my computer(with unity) but when I tried it on another computer(without unity)it did not work - is this normal?
The PlayerPrefs class provides a simplified and easy to use API for saving persistent data (in the Editor, PC or mobile platforms).
Data that is saved in one machine will not be available on the other machine though. It has to be saved there as well.
On Windows, for example, Unity uses the registry to save data from PlayerPrefs.
You can read more about it in the documentation page here: PlayerPrefs