None (single NTFS partition)
Every new guest PC needs the engine's dependencies. Run the installers located in Engine/Extras/Redist/en-us . unreal engine 5 portable
On an iPhone 15 Pro, a UE5 project running a simplified interior scene (no Nanite, Lumen at low quality) can hold 60 FPS at 1080p. The GPU usage hovers around 70%. It is entirely viable. None (single NTFS partition) Every new guest PC