Replacement PlayGTAV.exe for the Epic Games Store version of Grand Theft Auto V

PlayGTAV.cs

using System.Diagnostics;
using System.IO;
using Microsoft.Win32;

//
// If you replace PlayGTAV.exe in your game folder with this code, it'll fix two problems:
//  - The game will launch successfully if you simply double click PlayGTAV.exe (it'll actually launch EGS properly)
//  - You won't have to accept a UAC prompt every time you launch the game
//  - If the exe doesn't find Rockstar Social Club, it'll try and install it from the default location
//
// Rockstar could've done this very easily, but they didn't, because Rockstar are twats.
//
static class Program
{
    private const string INSTALLER_REG_KEY = "SOFTWARE\\WOW6432Node\\Rockstar Games\\Launcher";

    static void Main(string[] args)
    {
        if (args.Length == 0)
        {
            Process.Start("com.epicgames.launcher://apps/9d2d0eb64d5c44529cece33fe2a46482?action=launch&silent=true");
        }
        else
        {
            var key = Registry.LocalMachine.OpenSubKey(INSTALLER_REG_KEY); // support non-standard launcher locations
            if (key == null)
            {
                // if we couldn't open the key, it's safe to assume Social Club isn't installed
                var installerPsi = new ProcessStartInfo(Path.Combine(Directory.GetCurrentDirectory(), "Redistributables", "Rockstar-Games-Epic.exe"));
                installerPsi.Verb = "runas";

                Process.Start(installerPsi).WaitForExit();
                key = Registry.LocalMachine.OpenSubKey(INSTALLER_REG_KEY);
            }

            var val = (string)key.GetValue("InstallFolder");
            var psi = new ProcessStartInfo($@"{val}\Launcher.exe", string.Join(" ", args) + " -skipPatcherCheck -epicAppId=gta5 @args.txt");
            psi.UseShellExecute = false;
            Process.Start(psi).WaitForExit();
        }
    }
}

Kxo