Userscript to download from retrogames.cc.

retrogames-dl.user.js

// ==UserScript==
// @name         RetroGames.cc Downloader
// @version      1.0
// @description  try to take over the world!
// @author       tacohitbox
// @match        https://www.retrogames.cc/*-games/*
// @icon         https://www.google.com/s2/favicons?domain=retrogames.cc
// @grant        none
// ==/UserScript==

if (document.querySelector(".start-game")) {
    var b = document.createElement("br");
    var dl = document.createElement("button");
    dl.classList.add("button");
    dl.classList.add("large");
    dl.innerHTML = "Download Game";
    dl.onclick = function() {dlGame();}
    document.querySelector(".game-container").append(b);
    document.querySelector(".game-container").append(dl);
}

function dlGame() {
    var s = `https:${document.querySelector(".game-container script").innerHTML.split(`'src', '`)[2].split(`').css`)[0]}`;
    var x = new XMLHttpRequest();
    x.open("GET", s);
    x.send();
    x.onload = function() {
        var u = x.responseText.split(`EJS_gameUrl = '`)[1].split(`'`)[0];
        window.open(u, "_self");
    }
}