public interface iCopyable 
    iCopyalbe Copy();


public class Enemy: MonoBehaviour, iCopyable 
    public iCopyable Copy() 
        return Instantiate(this);
    


public class Sniper: Enemy 
    public void Shoot() 
        // Implement shooting functionality
    


public class Drone: Enemy 
    public void Fly() 
        // Implement flying functionality
    
    
    public void Fire() 
        // Implement laser fire functionality.
    


public class EnemySpawner: MonoBehaviour 
    public iCopyable m_Copy;
    
    public Enmey SpawnEnemy(Enemy prototype) 
        m_Copy = prototype.Copy();
        return (Enemy)m_Copy;
    


public class Client: MonoBehaviour 
    public Drone m_Drone;
    public Sniper m_Sniper;
    public EnemySpawner m_Spawner;
    
    private Enemy m_Spawn;
    
    private int m_IncrementorDrone = 0;
    private int m_IncrementorSniper = 0;
    
    public void Update() 
        if (Input.GetKeyDown(KeyCode.D)) 
            m_Spawn = m_Spawner.SpawnEnemy(m_Drone);
            
            m_Spawn.name = "Drone_Clone_" + ++m_IncrementorDrone;
        
        
        if (Input.GetKeyDown(KeyCode.S)) 
            m_Spawn = m_Spawner.SpawnEnemy(m_Sniper);
            
            m_Spawn.name = "Sniper_Clone_" + ++m_IncrementorSniper;

View Code

4. The Factory Method

public enum NPCType 
    Farmer,
    Beggar,
    Shopowner



public interface INPC 
    void Speak();


public class Farmer: INPC 
    public void Speak() 
        Debug.Log("Farmer: You reap what you sow!");
    


public class Beggar: INPC 
    public void Speak() 
        Debug.Log("Beggar: Do you have some change to spare?");
    


public class Shopowner: INPC 
    public void Speak() 
        Debug.Log("Shopowner: Do you wish to purchase something");
    


public class NPCFactory: MonoBehaviour 
    public INPC GetNPC(NPCType type) 
        switch (type) 
            case NPCType.Beggar:
                INPC beggar = new Beggar();
                return beggar;
            case NPCType.Farmer:
                INPC farmer = new Farmer();
                return farmer;
            case NPCType.Shopowner:
                INPC shopowner = new Shopowner();
                return shopowner;
        
        return null;
    


public class NPCSpanwer: MonoBehaviour 
    public NPCFactory m_Factory;
    
    private INPC m_Farmer;
    private INPC m_Beggar;
    private INPC m_Shopowner;
    
    public void SpawnVillagers() 
        m_Beggar = m_Factory.GetNPC(NPCType.Beggar);
        m_Farmer = m_Factory.GetNPC(NPCType.Farmer);
        m_Shopowner = m_Factory.GetNPC(NPCType.Shopowner);
        
        m_Beggar.Speak();
        m_Farmer.Speak();
        m_Shopowner.Speak();
    


public class Client: MonoBehaviour 
    public NPCSpanwer m_SpawnerNPC;
    
    public void Update() 
        if (Input.GetKeyDown(KeyCode.S)) 
            m_SpawnerNPC.SpawnVillagers();