Update: I got beamng.drive to work I haven’t tried space engineers although my guess is it will work but without audio (acording to everyone on protondb) whuch is unplayable imo so i will probably use windows for that. The problem was that I didn’t have write permissions on my secondary hard drive which is probably linked to my Windows install (I am currently dual booting with two ssd’s) so I installed beamng onto my main ssd and everything just worked!

Not sure how to fix the write permission error I’ve tried launching dolphin with root privileges. At the moment the best solution I can think of is formatting my hdd on Windows and then that may fix it. Although it would be nice if there was a solution without formatting it.