Version: 2017.1
public static void Quit ();



Quit is ignored in the editor. IMPORTANT: In most cases termination of application under iOS should be left at the user discretion. Consult Apple Technical Page qa1561 for further details.

using UnityEngine;
using System.Collections;

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