Transfer the folder to the target offline computer (e.g., paste it to D:\UnrealEngine\UE_4.27 ).
Download and install the Epic Games Launcher from www.epicgames.com . Log in with your Epic account (you must have accepted the UE4 license agreement).
: Extract the folder to your chosen installation path on the offline machine. Maintain the same relative folder structure to minimize configuration issues.
Click the plus sign (+) to add a new version, selecting .
What (Windows, Mac, or Linux) will you be deploying the engine on?
You can download the full repository as a .zip file, which contains all necessary files to compile the engine offline. 4. Alternative Method: Pre-compiled Offline Installers
Right-click the project in the Solution Explorer and click Build . Depending on your CPU, compilation will take between 30 minutes to 3 hours. Once done, you can launch the engine via Engine\Binaries\Win64\UE4Editor.exe . Method 3: Using Epic's Academic and Enterprise Installer
Avoids waiting for the Epic Games Launcher to download dozens of gigabytes for each machine or computer.
Ensure you always have access to version 4.27, even if Epic Games updates its launcher or modifies legacy support.
Click the green button and select Download ZIP . This file contains the complete blueprint of the engine and can be moved safely via a USB drive to an offline computer. Step 3: Run the Dependency Setup Offline Extract the downloaded ZIP file on your target machine.
If you need help choosing between these methods, let me know:
