Unity: система сохранения для любого проекта

public class TransformSaver : MonoBehaviour
{
	[SerializeField]
	private Transform[] _transforms;
	private readonly SaveManager _saveManager = new SaveManager();

	private void Start() {
		for (var index = 0; index < _transforms.Length; index++)
			_saveManager.Register(new TransformSave(index.ToString(), _transforms[index]));
	}

	[ContextMenu("Save")]
	public void Save() {
		_saveManager.Save();
	}

	[ContextMenu("Load")]
	public void Load() {
		_saveManager.Load();
	}

}

public class SaveManager
{
	private readonly List<ISave> _saves = new List<ISave>();

	public void Register(ISave element) { _saves.Add(element); }

	public void Unregister(ISave element) { _saves.Remove(element); }

	public void Save() {
		var saves = new Saves();
		foreach (var save in _saves)
			saves.Add(save.Uid, save.Serialize());
		PlayerPrefs.SetString("Save", JsonUtility.ToJson(saves));
		PlayerPrefs.Save(); // Force save player prefs
	}
	public void Load() {
		var json = PlayerPrefs.GetString("Save", "");
		if (string.IsNullOrEmpty(json))
			return;
		var saves = JsonUtility.FromJson<Saves>(json);
		for (var index = 0; index < saves.Uids.Count; index++) {
			var element = _saves.Single(x => x.Uid == saves.Uids[index]);
			element.Deserialize(saves.List[index]);
		}
	}

	[Serializable]
	private class Saves
	{
		public List<string> Uids = new List<string>();
		public List<string> List = new List<string>();

		public void Add(string uid, string value) {
			if (Uids.Contains(uid))
				throw new ArgumentException("Uids has already have \"" + uid + "\"");
			Uids.Add(uid);
			List.Add(value);
		}
	}

}
	
public interface ISave
{
	string Uid { get; }
	string Serialize();
	void Deserialize(string json);
}

public class TransformSave : ISave
{

	private readonly Transform _transform;
	public string Uid { get; private set; }

	public TransformSave(string uid, Transform transform) {
		Uid = uid;
		_transform = transform;
	}

	public string Serialize() {
		return JsonUtility.ToJson(
			new TransformData {
				                  Position = _transform.position,
				                  Rotation = _transform.rotation
			                  }
		);
	}

	public void Deserialize(string json) {
		var deserialized = JsonUtility.FromJson<TransformData>(json);
		_transform.SetPositionAndRotation(deserialized.Position, deserialized.Rotation);
		D.Log("Json", json);
	}

	[Serializable]
	private class TransformData
	{
		public Vector3 Position;
		public Quaternion Rotation;
	}
}