Ron mentions this Kornis Rift early in the talk.

I never played it (yet), but the cover looks more like Oculus Rift than Koronis Rift!
Interesting that he calls it 'a few weeks' of coding in assembly before starting to code SCUMM. It was a very barebones and basic time back then, no AGS, no SCUMM, no fancy engines, but I guess I would have figured out the need for an engine even faster...