Proponents of these archives argue they are essential for cultural preservation, as physical cartridges degrade over time (bit rot) and hardware becomes scarce.
: The gold standard for speed and platforming. Sonic 3 & Knuckles remains a masterpiece of level design. Sega Genesis Roms Archive
Recently, rights holders have been issuing massive DMCA takedowns against large ROM repositories. The Sega Genesis is in a unique spot because Sega is very lenient compared to Nintendo. Proponents of these archives argue they are essential
Before building an archive, it is essential to understand the different file types associated with Genesis/Mega Drive software. Sega Genesis Roms Archive
This is preferred if you want to catalog every version of a game.