Save a game scene to file at runtime with many dynamically instanced gameObjects in and textures

it is alot easier than what it seems, bear with me it is a bit long, I hope this helps.

first step:

 using.UnityEngine;
 using.System;
 using.System.IO;
 using.System.Collections;
 using System.Runtime.Serialization.Formatters.Binary;

next declare all your variables (I have mine as public, as this is the core for my character):

 DateTime    now         = DateTime.Now;
 string      format      = "dd MM yyyy  hh:mm";
 string      loadDate;
 string      saveDate;
 
 public int  Level        = 1;
 public int  currentXP    = 0;
 public int  toNxtLvl     = 500;
 public int  health       = 5;
 public int  strength     = 1;
 public int  stanima      = 1;
 public int  agility      = 1;
 Vector3     playerPos;
 
 public static _GameControl control; //with this you can acces the variables in this class from another //script by going _GameControl.control.health;

now you need to put in this to ensure that the data in this script is stored between scenes and so you cant accidently spawn 2 of this class ( so if you change scene the original will change scene with you and will remove any copys in the new scene) to do that you need this:

 void Awake()
 {
     if (control == null)
     {
         DontDestroyOnLoad(gameObject);
         control = this;
     }
     else if(control != null)
     {
         Destroy(gameObject);
     }
 }

now you need a new class that can serialise your data which looks like this:

 [System.Serializable]
 class playerData

 {

 public int      level;
 public int      curXp;
 public int      toNxt;
 public int      health;
 public int      strength;
 public int      stanima;
 public int      agility;
 public Vector3  pPos;

//these all need to be public so you can access them through save and load }

now you need a Save Function:

 void Save()

 {
     playerPos = GameObject.Find("Player").transform.position;

     saveDate = (now.ToString(format));

     BinaryFormatter binary  = new BinaryFormatter();
     FileStream file         = File.Create(Application.persistentDataPath +"/SaveGame.dat"); //the creates a file in the unity app data path
     playerData dat          = new playerData();

     dat.level       = Level;    //this transfers the data you want to your serializable class
     dat.curXp       = currentXP;                      
     dat.toNxt       = toNxtLvl;                           
     dat.health      = health;                           
     dat.strength    = strength;
     dat.stanima     = stanima;
     dat.agility     = agility;
     dat.pPos        = playerPos;

     binary.Serialize(file, dat);
     file.Close();

and finally the load function which is pretty much the same as the save but kinda reversed:

 void Load()
 {
     if (File.Exists(Application.persistentDataPath + "/SaveGame.dat"))
     {
         BinaryFormatter binary  = new BinaryFormatter();
         FileStream file         = File.Open(Application.persistentDataPath + "/SaveGame.dat", FileMode.Open);
         playerData dat          = (playerData)binary.Deserialize(file);
         file.Close();

         Level       = dat.level; //this sets all the saved data back onto your character or npc's
         currentXP   = dat.curXp;
         toNxtLvl    = dat.toNxt;
         health      = dat.health;
         strength    = dat.strength;
         stanima     = dat.stanima;
         agility     = dat.agility;
         playerPos   = dat.pPos;
     }
 }