For those specifically seeking a legacy experience without modern account requirements, the CryEngine 3 SDK
Once you have acquired the offline installer (let's assume a .exe or .7z file), follow these steps: cryengine offline installer
: For the most control, you can request access to the CRYENGINE GitHub repository to download the full source code. This allows you to compile and build the engine entirely offline once the initial repository clone is complete. Important Considerations You will need a computer with internet access
Download the source code from the official CRYENGINE GitHub repository. Future you—staring at a broken launcher the night
You will need a computer with internet access to perform the initial download.
Check your current CryEngine version. If you haven't archived a backup of your installer yet, do it today. Future you—staring at a broken launcher the night before a deadline—will be eternally grateful.