Converting UE4 File into League standalone file

Hi folks. League of Legends is a great game, but it only has . exe file to run all the necessary game files including updates, and frequent services. But packaged UE4 file cannot run games without 15+ other files. How do I convert ue4 game files into single standalone .exe file to run on windows?

I’ve seen some people do it on Youtube and Google. Please teach me me this trick. Thank you.