The furthest I've seen publicly is the original Playstation ASICs. http://psxdev.ru/ http://psxdev.ru/ [Russian Language] Similar in time to the playstation A

The furthest I've seen publicly is the original Playstation ASICs. http://psxdev.ru/ http://psxdev.ru/ [Russian Language] Similar in time to the playstation ASICs (and similar design in sort of a soup of standard cells on a CMOS process), but at a gate count similar to Ken's fantastic work here on the 8086 is the work reversing the Gameboy SoC: https://github.com/furrtek/DMG-CPU-Inside https://github.com/furrtek/DMG-CPU-Inside Chip manufacturers, professional chip reversers, and academic institutions have the tooling to take chips apart at varying levels of granularity all the way down to atom by atom if necessary.