Legal and ethical issues
In the early 2000s, long before high-speed fiber internet, downloading individual games was a chore. This gave rise to the legendary packs found on pirate sites and shared CDs. This specific number—900—represented a "sweet spot" of arcade history. It wasn't the complete, massive library of every obscure title, but a curated "best-of" collection that included: The Classics: Pac-Man , Donkey Kong , and Galaga . Mame32 Plus- Full - 900 Roms