Unreal Engine 4.27 remains one of the most stable and popular versions of Epic Games' flagship engine. Many developers, students, and studios prefer it for its optimization, robust feature set, and lower system requirements compared to Unreal Engine 5.
Copy the entire UE_4.27 folder (e.g., to a USB drive or external hard drive). download unreal engine 4.27 offline installer
git clone -b 4.27 https://github.com/EpicGames/UnrealEngine.git Unreal Engine 4