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Unreal Engine 5 – Complete Beginner to Advanced Guide
CHAPTER 17 Intermediate

Packaging and Publishing Games

Updated: May 16, 2026
20 min read

# CHAPTER 17

Packaging and Publishing Games

1. Introduction

You have spent months building a masterpiece. The code is clean, the lighting is cinematic, and the AI is ruthless. But right now, the only way to play the game is to open the massive Unreal Engine editor and press "Play." You cannot send the 80GB editor to your friends or upload it to Steam. You must compile the raw code, compress the massive 8K textures, and bundle it all into a single, executable .exe file. This process is called Packaging (or "Building"). In this chapter, we will master the final step of game development. We will configure project settings, choose our target platforms, and execute a standalone Windows build.

2. Learning Objectives

By the end of this chapter, you will be able to:
  • Understand the difference between "Development" and "Shipping" build configurations.
  • Configure Maps and Modes for startup.
  • Package a game for Windows Desktop (.exe).
  • Understand the prerequisites for Android/iOS mobile packaging.
  • Identify the basic workflows for Steam and console deployment.

3. Configuring Project Settings (Before You Build)

Before clicking the "Package" button, you must tell the engine *what* to package.
  • Go to Edit > Project Settings.
  • Maps & Modes: This is critical. You must set the "Game Default Map." If you leave this blank, the player will double-click your .exe and be dropped into an empty black void. Set it to your Main Menu level.
  • Description & Icons: Here, you set the Game Name, Company Name, and upload the .ico graphic that will appear on the player's Windows Desktop.

4. Build Configurations (Development vs. Shipping)

When packaging, you must choose a configuration:
  • Development Build: Packages the game quickly, but leaves debugging tools turned on. If the player presses the ~ key, the console opens. They can type "fly" and cheat. This is used for QA testing.
  • Shipping Build: The final version. The engine heavily compresses all files, strips out all developer debugging tools, and encrypts the code to prevent hacking. It runs much faster but takes longer to compile. This is what you upload to Steam.

5. Packaging for Windows Desktop

This is the most common target.
  • Ensure Visual Studio is installed (Unreal needs its C++ compiler to create the .exe).
  • Go to Platforms > Windows.
  • Select your Configuration (e.g., Shipping).
  • Click Package Project.
  • Choose an empty folder on your hard drive. Unreal will now spend anywhere from 10 minutes to 5 hours (depending on project size) "Cooking" the assets (compressing textures and compiling code).
  • Result: A folder containing YourGameName.exe. You can zip this folder and send it to anyone!

6. Packaging for Mobile (Android/iOS)

Packaging for phones is much more complex than Windows.
  • Android: You must install Android Studio, the Android SDK, NDK, and Java. You must generate a "Keystore" signature to prove you are the developer. The engine outputs an .apk or .aab file for the Google Play Store.
  • iOS: You *cannot* package an iOS game on a Windows PC. Apple's strict ecosystem requires you to own a Mac computer running Xcode to compile the final .ipa file for the App Store.

7. Visual Learning: The Packaging Pipeline

txt
12345678910 
[ Raw UE5 Project (50GB) ]
        |
        v
[ "Cooking" Phase ] ---> Engine resizes textures, strips out unused assets, and compiles Blueprints into raw C++ machine code.
        |
        v
[ "Packaging" Phase ] -> Engine bundles the cooked assets and the Engine binary together.
        |
        v
[ Shipping Output (5GB) ] -> WindowsNoEditor Folder -> 'MyGame.exe'

8. Best Practices

  • Test Packaged Builds Early: Do not wait until the final week of a 2-year project to test your first Packaged Build. Sometimes, code that works perfectly inside the Editor will crash in a Packaged Build (often due to file directory path errors). Package your game once a month to catch deployment bugs early.

9. Common Mistakes

  • Packaging Unused Assets: By default, Unreal Engine packages *everything* in your Content Browser. If you downloaded a 10GB pack of high-res cars from the Marketplace, but only used one car in the game, the other 9GB of unused cars will still end up in the final .exe. To fix this, go to Project Settings -> Packaging -> check "Exclude editor content when cooking" and specifically list the maps you want to package.

10. Mini Project: Build Your Game

Objective: Create a playable, standalone Windows executable.
  1. 1. Open your project. Go to Edit -> Project Settings -> Maps & Modes.
  1. 2. Set the Game Default Map to your main level.
  1. 3. Close the settings. Go to the top toolbar, click Platforms -> Windows.
  1. 4. Ensure the Configuration is set to Development (for speed).
  1. 5. Click Package Project.
  1. 6. Select an empty folder on your desktop. Wait for the "Packaging Complete" notification.
  1. 7. Open the folder, find the .exe, and double-click it. Congratulations, you have a standalone video game running outside of the editor!

11. Practice Exercises

  1. 1. Define the difference between a "Development" build and a "Shipping" build.
  1. 2. Why must you set a "Game Default Map" before packaging your project?

12. MCQs with Answers

Question 1

A developer finishes their game and wants to upload it to Steam. They want the game to run as fast as possible, have the smallest file size, and prevent players from opening the developer console to cheat. Which build configuration must they choose?

Question 2

During the packaging process, the engine performs a step called "Cooking." What happens during this step?

13. Interview Questions

  • Q: A junior developer packages a simple 1-level platformer game, but the final file size is 25GB. What mistake did they make regarding project settings and unused assets, and how would you fix it?
  • Q: Explain why you cannot natively package a final, ready-to-ship iOS game on a Windows PC. What hardware/software is required?
  • Q: You hit "Play" in the Editor and the game works perfectly. You package the game, double-click the .exe, and the game crashes immediately on startup. What is the standard troubleshooting process to find out why the packaged build is crashing?

14. FAQs

Q: How do I publish to PlayStation or Xbox? A: Console development is strictly NDA (Non-Disclosure Agreement) protected. You must apply to Sony or Microsoft directly as a registered company. Once approved, Epic Games will grant you access to hidden sections of the Unreal Engine source code required to compile for those consoles.

15. Summary

In Chapter 17, we transformed our raw project files into a distributable product. We learned the critical pre-flight checks: setting the Default Map and configuring icons. We differentiated between Development builds (for internal QA) and Shipping builds (optimized and secured for the public). By mastering the Cooking and Packaging pipelines, we successfully exported a standalone Windows executable. The game is no longer just a project on your hard drive; it is a reality ready for the world.

16. Next Chapter Recommendation

You know the entire pipeline. Now, let's look at how massive studios use this pipeline to build worlds the size of countries. Proceed to Chapter 18: Unreal Engine 5 for Open World and AAA Games.

Finish this Chapter

Save your progress on your learning path and prepare for coding interview challenges.

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