Store objects in PlayerPrefs.

Usage:

var myObject = new MyClass();
Prefs.Save<MyClass>("my object", myObject);
var anotherObject = Prefs.Load<MyClass>("my object")

or something like that...

using UnityEngine;
using System.Collections;
using System.Xml.Serialization;
using System.IO;


public class Prefs
{

    public static void Save<T> (string name, T instance)
    {
        XmlSerializer serializer = new XmlSerializer (typeof(T));
        using (var ms = new MemoryStream ()) {
            serializer.Serialize (ms, instance);
            PlayerPrefs.SetString (name, System.Text.ASCIIEncoding.ASCII.GetString (ms.ToArray ()));
        }
    }

    public static T Load<T> (string name)
    {
        if(!PlayerPrefs.HasKey(name)) return default(T);
        XmlSerializer serializer = new XmlSerializer (typeof(T));
        T instance;
        using (var ms = new MemoryStream (System.Text.ASCIIEncoding.ASCII.GetBytes (PlayerPrefs.GetString (name)))) {
            instance = (T)serializer.Deserialize (ms);
        }
        return instance;
    }
    
}