I added an in-progress Z80 disassembly of Gorf to BallyAlley.com. You can download it here:
Here are some additional details about the game:
In 2018, Jamie Fenton (formally Jay Fenton) donated documentation and hardware items to the Computer History Museum in Mountain View, CA. This included Gorf source code and other documentation related to the game. Gorf was not written in machine language, it was written in a Forth-like language called TERSE (Terse Efficient Recursive Stack Engine) that was developed at DNA.
After the TERSE source code for Gorf became available, David Turner, an avid fan of the game, began to use the game's source code to disassemble Gorf and comment it. Details of his work, as well as his in-progress Z80 disassembly for Gorf is in this archive. In Dave's notes, he refers to TERSE and Gorf related documents which are available at the BitSavers archive, here:
It's great that the recent archiving of the TERSE source code for Gorf is already bearing fruit.