So, I've spent the last few days using all the knowledge I've learned working with ArcTyr to fork OpenTyrian (again...) and finally add *proper* Tyrian 2000 support.
The source code is publicly available: https://github.com/KScl/opentyrian2000
No builds currently because I don't have an environment set up to build for Windows.
Further screenshots: Various levels exclusive to Tyrian 2000.