unity3D退出游戏代码

Sure, here is an example of how you can write code to quit a Unity game:

using UnityEngine;
using System.Collections;

public class QuitGame : MonoBehaviour
{
    // Update is called once per frame
    void Update()
    {
        if (Input.GetKey("escape"))
        {
            Application.Quit();
        }
    }
}

This code checks for the user pressing the "Escape" key, and if they do, the application will quit.