I am also concerned about the 100mb file size. Looking at the bare minimum build I can get UE4 to make, there is a 62mb Engine folder that contains system files which I presume cannot be removed. That leaves 38mb for actual game, which isn’t much. My current build has only a couple textures, and a small level and it still takes 200mb just for the pak. Looks like the 100mb limit is very hard to reach. But I feel it would be impossible if you don’t exclude to 62mb Engine folder.