Arcade Roms
Consider what arcade hardware actually was: unique, fragile, proprietary. Many PCBs (printed circuit boards) have corroded or cracked. Dedicated cabinets were scrapped for their monitors. Without ROMs, entire generations of games would simply evaporate — Polybius myths aside, real obscurities like War of the Bugs or The Outfoxies survive today almost exclusively because someone, somewhere, dumped their EPROMs before the board died.
Before you download anything, you must understand two concepts that confuse most beginners: arcade roms