The namespace `global::' already contains a definition for `ShooterGameCamera'

Questions & Answers
1

error at line “public class ShooterGameCamera : MonoBehaviour {” this is upper part of script ShooterGameCamera.cs taken from 3rdpersonshooter unity demo game

using UnityEngine;
using System.Collections;

// 3rd person game-like camera controller
// keeps camera behind the player and aimed at aiming point
public class ShooterGameCamera : MonoBehaviour {
	
	public Transform player;
	public Transform aimTarget;
	
	public float smoothingTime = 0.5f;
	public Vector3 pivotOffset = new Vector3(1.3f, 0.4f,  0.0f);
	public Vector3 camOffset   = new Vector3(0.0f, 0.7f, -2.4f);
	public Vector3 closeOffset = new Vector3(0.35f, 1.7f, 0.0f);
	
	public float horizontalAimingSpeed = 270f;
	public float verticalAimingSpeed = 270f;
	public float maxVerticalAngle = 80f;
	public float minVerticalAngle = -80f;
	
	public float mouseSensitivity = 0.1f;
	
	public Texture reticle;
	
	private float angleH = 0;
	private float angleV = 0;
	private Transform cam;
	private float maxCamDist = 1;
	private LayerMask mask;
	private Vector3 smoothPlayerPos;
2

It means exactly what it says. Somewhere in your source files (or a third party library) you have a class called ShooterGameCamera.

The simplest thing to do is to rename your class, although it may be worth finding out where else you have that class declared.

3

Problem Fixed here : The namespace already contains a definition for Unity - YouTube

4

Or if you prefer to read, you can check out this article here, which goes through a few possible causes of the error and how to fix each of them: The namespace “ already contains a definition for… — Terresquall Blog