You must have physical access to the internals of the machine you want to hack. The key part of the hack is performed by placing a small PCB's along the TPM (Trusted Platform Module) chip contacts.
Someone had mentioned on the forum you were taking the lead role about inquiring about MM2 way back in the long ago old MAME.net web site forum era when Gridle was hosting MAME.net on ztnet way back around 2000 era. I recall the thread, but I was guessing it was Al Kossow, but that was long ago.
I am glad the drama ended in 2022.
Marble Madness II / Marble Madness 2 (Atari prototype arcade game) is now playable in MAME
Now about that Choplifter 1987? coinop game, there is a long shot odds scenario in which there might be someone that posts comments on live feeds when Haze posts some new videoclip on Haze YouTube page. The poster is Australian and seems to have a mind similar to N. American Jeopardy tv show host Ken Jennings.
The poster knows his stuff and probably already knows the game name and the company that made the game.