Nice! No worries, glad I could help :)

Any chance it was „CYB3R HUNT“? I‘ve never played it but saw a post about it here a while ago…

(Here‘s my adjusted version too in case that helps :)

I had the same problem (running Fedora 38), and this post really helped me - it goes through the whole MOK generation/enrollment and then provides a script to automatically sign the modules. I had to make a couple of adjustments to make it work on my system and to automatically load the modules with modprobe , but now I just run /sbin/vboxconfig; /root/bin/sign-vbox-modules each time my kernel gets updated and can use VBox fine again.

Maybe Antichamber? It‘s a first-person puzzle game like Portal, but based on the idea of the „rooms“ changing as you go through them, so each room basically has its own mechanic to figure out