Multiple Enemies dying rather than one?!

Questions & Answers
1

Using this code, I get multiple enemies dying at once rather than a single enemy

using UnityEngine;
using System.Collections;

public class EnemyHealth : MonoBehaviour
{
public int startingHealth = 100;
public int currentHealth;
public bool isDead;

void Awake ()
{
	currentHealth = startingHealth;
}

void OnCollisionEnter(Collision col)
{
	if(col.gameObject.name == "PistolBullet")
	{
		currentHealth = startingHealth - 10;
	}

	if (currentHealth <=0)
	{
		isDead = true;
		Dead ();
	}
}

void Dead ()
{
	if (isDead = true)
	{
		Destroy (gameObject, 2f);
	}
}

}

2

You may have forgotten to ensure a bullet can only hit once (rather than going through several enemies) but this code seems ok.