: Nintendo and other rights holders periodically issue DMCA takedown notices to sites hosting their ROMs. Ethical Preservation
If you want a legal "All NES Games ROMs repack," you would have to buy every single cartridge (cost: ~$50,000+) and a device like the or INLretro dumper to extract the data yourself. For 99% of users, this is unrealistic, which is why existing repacks thrive on historical preservation forums rather than piracy marketplaces.
: Repacks often strip out "junk" data or duplicate regions, ensuring you only get the best versions of each game. Hardware Compatibility
If you download a legitimate "All NES Games ROMs repack" (usually sourced from a "No-Intro" or "GoodNES" collection), here is exactly what you will find, broken down by category.