AI for 3rd person shooter

how do you create artificial intelligence for a 3rd person shooter game…
preferably an enemy which walks and shoots once in range??

First start with a path-finding system so the enemy walks towards the player:

http://www.arongranberg.com/unity/a-pathfinding/

Then write a script that measures the distance between the enemy and the player. Ex.

var distance = Vector3.Distance(obj.transform.position, transform.position);

Then have the script make the enemy look at your player if the distance is less than the distance you want. Ex.

var Player : GameObject;
var distanceTillShoot : float;

function FixedUpdate(){
var distance = Vector3.Distance(Player.transform.position, transform.position);
if (distance <= distanceTillShoot){
gameObject.transform.LookAt(Player)
   }

}

Then after the enemy is looking at the player have it instantiate a bullet moving forward in the local axis. Make sure to create a bullet Prefab, probably just a small sphere with a collider and rigidbody attached. Ex.

var Player : GameObject;
var Bullet : Rigidbody;
var projectileSpeed : float;
var distanceTillShoot : float;

function FixedUpdate(){
var distance = Vector3.Distance(Player.transform.position, transform.position);
if (distance <= distanceTillShoot){
gameObject.transform.LookAt(Player)
var bullet : Rigidbody=Instantiate(Bullet,transform.position,Quaternion.identity);
bullet.rigidbody.AddRelativeForce(transform.forward * projectileSpeed);
   }

}

If you want a sniper or something just increase the distance till shoot variable. ...............................................................................................................................................................................

If your just starting out start with something simpler like a game where you have to dodge

balls or something. Making a Third Person Shooter or FPS isn't for the faint of heart, it takes much

understanding and execution of scripts and components to create one.