Application.Quit

static function Quit () : void

Description

Quits the player application. Quit is ignored in the editor or the web player.

IMPORTANT: This function has no effect on iPhone. Termination of application under iPhone OS should be left at the user discretion. Consult Apple's Technical Q&A qa1561 page for further details: http://developer.apple.com/iphone/library/qa/qa2008/qa1561.html

JavaScripts

// Quits the player when the user hits escape
function Update () {
if (Input.GetKey ("escape")) {
Application.Quit();
}
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void Update() {
if (Input.GetKey("escape"))
Application.Quit();

}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def Update():
if Input.GetKey('escape'):
Application.Quit()