Awesome website for reverse engineering retro games:
Tutorials, tools, and more as related to reverse engineering video games.
A curated list of Game Boy development resources such as tools, docs, emulators, related projects and open-source ROMs.
A curated list of awesome game decompilations, recompilations and disassemblies.
A curated list of original and reverse-engineered vintage 6502 game sourcecode.
Source code of some NES games
An annotated disassembly with supplemental materials of the Contra (US) and Probotector NES game.