@@ -0,0 +1,120 @@
+// builds single standalone exe from your Unity build (using 7-Zip SFX module)
+// Note: Change those hardcoded 7zip paths for you
+// Note: Download SDK package for the 7zSD.sfx files https://www.7-zip.org/download.html
+
+using UnityEditor;
+using UnityEditor.Callbacks;
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Text;
+
+namespace UnityLibrary.BuildTools
+{
+    public static class SingleExePostProcessor
+    {
+        private const string SevenZipExe = @"D:\Program Files\7-Zip\7z.exe";
+        private const string SevenZipSfx = @"D:\sdk\lzma2603\bin\7zSD.sfx";
+
+        [PostProcessBuild(1000)]
+        public static void OnPostProcessBuild(BuildTarget target, string pathToBuiltProject)
+        {
+            if (target != BuildTarget.StandaloneWindows64)
+                return;
+
+            string buildExe = Path.GetFullPath(pathToBuiltProject);
+            string buildDirectory = Path.GetDirectoryName(buildExe);
+            string exeName = Path.GetFileName(buildExe);
+            string gameName = Path.GetFileNameWithoutExtension(buildExe);
+
+            if (buildDirectory == null)
+                return;
+
+            if (!File.Exists(SevenZipExe))
+            {
+                UnityEngine.Debug.LogError("7-Zip not found: " + SevenZipExe);
+                return;
+            }
+
+            if (!File.Exists(SevenZipSfx))
+            {
+                UnityEngine.Debug.LogError("7-Zip SFX module not found: " + SevenZipSfx);
+                return;
+            }
+
+            string tempDirectory = Path.Combine(Path.GetTempPath(), "UnitySingleExe_" + Guid.NewGuid().ToString("N"));
+            Directory.CreateDirectory(tempDirectory);
+
+            string archivePath = Path.Combine(tempDirectory, "game.7z");
+            string configPath = Path.Combine(tempDirectory, "config.txt");
+            string outputExe = Path.Combine(Directory.GetParent(buildDirectory)?.FullName ?? buildDirectory, gameName + "_Standalone.exe");
+
+            try
+            {
+                CreateArchive(buildDirectory, archivePath);
+
+                string config = ";!@Install@!UTF-8!\r\n" + "Title=\"" + gameName + "\"\r\n" + "RunProgram=\"" + exeName + "\"\r\n" + "GUIMode=\"2\"\r\n" + ";!@InstallEnd@!\r\n";
+
+                File.WriteAllText(configPath, config, new UTF8Encoding(false));
+
+                using (FileStream output = File.Create(outputExe))
+                {
+                    AppendFile(output, SevenZipSfx);
+                    AppendFile(output, configPath);
+                    AppendFile(output, archivePath);
+                }
+
+                UnityEngine.Debug.Log("Single EXE created: " + outputExe);
+            }
+            catch (Exception e)
+            {
+                UnityEngine.Debug.LogException(e);
+            }
+            finally
+            {
+                try
+                {
+                    Directory.Delete(tempDirectory, true);
+                }
+                catch
+                {
+                }
+            }
+        }
+
+        private static void CreateArchive(string buildDirectory, string archivePath)
+        {
+            ProcessStartInfo psi = new ProcessStartInfo
+            {
+                FileName = SevenZipExe,
+                WorkingDirectory = buildDirectory,
+                Arguments = "a -t7z -mx=5 \"" + archivePath + "\" \"*\"",
+                UseShellExecute = false,
+                CreateNoWindow = true,
+                RedirectStandardOutput = true,
+                RedirectStandardError = true
+            };
+
+            using Process process = Process.Start(psi);
+
+            if (process == null)
+                throw new Exception("Could not start 7-Zip.");
+
+            string stdout = process.StandardOutput.ReadToEnd();
+            string stderr = process.StandardError.ReadToEnd();
+
+            process.WaitForExit();
+
+            if (process.ExitCode != 0)
+            {
+                throw new Exception("7-Zip failed.\n" + stdout + "\n" + stderr);
+            }
+        }
+
+        private static void AppendFile(Stream destination, string file)
+        {
+            using FileStream source = File.OpenRead(file);
+            source.CopyTo(destination);
+        }
+    }
+}