SaveStatesManager.cs

using System.Collections;
using UnityEngine;
using UnityEngine.SceneManagement;

public class SaveStatesManager : MonoBehaviour
{
    public List<SavedGameObject> savedState;

    public void SaveState()
    {
        GameObject[] allObjects =
            UnityEngine.Object.FindObjectsOfType<GameObject>();
        foreach (object go in allObjects)
        {
            SavedGameObject sGo = new SavedGameObject();
            STransform sTransform =
                new STransform(go.transform.position,
                    go.transform.localScale,
                    go.transform.rotation.eulerAngles);
            sGo.transform = sTransform;

            MonoBehaviour[] go_scripts =
                go.GetComponentsInChildren<MonoBehaviour>();
            foreach (MonoBehaviour mono in go_scripts)
            {
                switch (typeof (mono).ToString())
                {
                    case "Player":
                        Player player = go.GetComponent<Player>();

                        PlayerScript ps =
                            new PlayerScript(player.health, ScriptType.PLAYER);

                        sGo.scripts.Add (ps);
                        break;
                    case "Enemy":
                        Enemy enemy = go.GetComponent<Enemy>();

                        EnemyScript es =
                            new EnemyScript(enemy.health, ScriptType.ENEMY);

                        sGo.scripts.Add (es);
                        break;
                    default:
                        Debug.Log("can't serialize that, sorry");
                        break;
                }
            }
            savedState.Add (sGo);
        }
    }
}

class SavedGameObject
{
    public STransform transform;

    public List<Script> scripts;

    public SavedGameObject()
    {
        scripts = new List<Script>();
    }
}

class STransform
{
    public Vector3 pos;

    public Vector3 scale;

    public Vector3 rotation;

    public STransform(Vector3 _pos, Vector3 _scale, Vector3 _rotation)
    {
        pos = _pos;
        scale = _scale;
        rotation = _rotation;
    }
}

class Script
{
    public ScriptType type;

    public Script(ScriptType _type)
    {
        type = _type;
    }
}

class PlayerScript : Script
{
    public float health;

    public override Script(float _health)
    {
        health = _health;
    }
}

class EnemyScript : Script
{
    public float health;

    public EnemyScript(float _health, ScriptType _type)
    {
        type = _type;
        health = _health;
    }
}

enum ScriptType
{
    PLAYER,
    ENEMY
}