Here's Demon's Souls running in the RPCS3 PS3 emulator | PC Gamer
Guide for Setting up Demon Souls on a PS3 Emulator : r/demonssouls
Demon's Souls is playable on PC for the first time | GameWatcher
Demon's Souls on PC - install RPCS3, settings and gameplay (15.07.2017) - YouTube
Technology really has improved... playing Demon's Souls with PS3 emulator on my PC, streamed to my smartphone and using a Bluetooth controller : r/gaming