How to I make a gun shoot at mouse pointer,2.5d platformer

Hello , i have a 2.5d platformer with a player and some boxes and i can jump around , crouch , move rigid bodys with the player . Now i want to add a gun in the project. I want to be able to shoot at mouse pointer , rotate the player in the direction that my mouse is on my screen . This is a 3d game with the camera moved to look like a 2d platformer . I`ve searched but i cannot find a good script to start with. Thank you in advance !

u need to addforce to a gameobject and make it appear from a single point
attach an empty gameobject from where u want the bullets to appear(shoot) to your desired gameobject (your gun in this case)

create a sphere make it look like a bullet adjust it on unity it is easy

create a prefab on a folder and drag this bullet to the thePrefab variable below
then attach this script to your fps game object

private GameObject thePrefab;

public float shootingforce=40;

if(Input.GetMouseButton(0)
{

			instance = Instantiate(thePrefab,transform.position,Quaternion.identity)as GameObject;
		instance.rigidbody.AddForce(transform.right*shootingforce);

			Destroy (instance.gameObject,0.5f);

i have not tested but it must work if u follow the steps

It may help if you break this up into simple questions.

E.G

Q: How do I get the location of my mouse in the world?

A: Use a raycast from the mouse pointer into the world.

Q: How do I rotate my character to face the mouse pointer?

A: How is your character controlled? Mechanim? You could use something simple such as Transform.LookAt.

Q: How do I shoot?

A: Fire a raycast from the barrel of your gun and see what you hit or instantiate a projectile at the barrel and give it a velocity in the forward direction.

If you ask simple questions you will get a better response.

Karl