Volume 3 of the PoC || GTFO collection--read as Proof of Concept or Get the Fuck Out--continues the series of wildly popular collections of this hacker journal. Contributions range from humorous poems to deeply technical essays bound in the form of a bible.The International Journal of Proof-of-Concept or Get The Fuck Out is a celebrated collection of short essays on computer security, reverse engineering and retrocomputing topics by many of the world's most famous hackers. The journal covers topics like reverse engineering, retro-computing, and systems internals. This third volume contains all articles from releases 14 to 18 in the form of an actual, bound bible.Topics include how to dump the ROM from one of the most secure Sega Genesis games ever created; how to create a PDF that is also a Git repository; how to extract the Game Boy Advance BIOS ROM; how to sniff Bluetooth Low Energy communications with the BCC Micro:Bit; how to conceal ZIP Files in NES Cartridges; how to remotely exploit a TetriNET Server; and more.The journal exists to remind us of what a clever engineer can build from a box of parts and a bit of free time. Not to showcase what others have done, but to explain how they did it so that readers can do these and other clever things themselves.