The "99999 in 1" and its more common variant, "9999999-in-1", are the extreme, almost satirical peak of this trend. These cartridges were so prevalent that they became a defining memory for many gamers, particularly in regions where original games were hard to find. The physical cartridges themselves, often sold with Famiclones or on eBay, remain sought-after collector's items today.
The base NES hardware is limited to reading only 40KB of total ROM (32KB PRG and 8KB CHR). To play a massive game like Super Mario Bros. 3 , you need a special chip called a Memory Management Controller (MMC) to switch between banks of code. Pirate multicarts took this concept to the extreme.
To understand how a file can contain tens of thousands of games, you have to look at how NES data is stored.
They called it "99999-in-1" like a joke pressed into a scratched plastic shell: a glossy, off-brand NES cartridge salvaged from a cardboard bin at a night market where the neon hum blurred languages into a single buzz. The label was a smudge of cheap ink and optimism; someone had handwritten a title in blue felt-tip after a late-night dream. I bought it for a dollar and a half because it felt like a secret that had outlived its owner.
I recently downloaded a preservation dump of a "99999 in 1" ROM to see if the emulator could handle the hype. Spoiler: It took 45 seconds for the menu to render. nes rom 99999 in 1
Works in Nestopia, FCEUX, and Mesen. Some menu entries may crash or loop; this is expected behavior for these pirate dumps.
When the battery finally wore out and the save function forgot who had been in which room, the cartridge's menu lost its annotations. The tiles blurred back to their plain names like fossils erasing the soft tissue of stories. I could have thrown it away, but it is still on my shelf, scuffed and dignified, a permanent unfinished sentence.
The "NES ROM 99999 in 1" is a masterpiece of bootleg marketing and a complete failure of computational logic.
If you download the actual file called 99999 in 1.nes (single file, size ~3MB), you will open it in an emulator like Nestopia or FCEUX, see a flashy menu with a dragon, and discover that options 1 through 30 work, but option 31 crashes the emulator. The "99999 in 1" and its more common
This is the most common bait-and-switch. A user will upload a ZIP file labeled 99999_in_1.zip , but inside, you will find a folder containing roughly 2,000 to 3,000 ROMs. Because 99,999 is a rounded, sexy number, pirates often rename their "Complete NES Collection" (which is usually about 2,000 unique titles) using the "99999" moniker to drive clicks.
: An incredibly popular Namco game that became a cult hit in bootleg markets due to its level-editor feature.
) or sold for just a few dollars, giving kids hours of entertainment.
Because storage memory (ROM chips) was incredibly expensive in the early 90s, these creators couldn't just pack 100 real games onto a board. Duplicating a game code requires zero extra space if you just change a single variable point to alter the starting level or color scheme. The 99999-in-1 ROM is a masterclass in data compression and marketing exaggeration. The Legacy: Why We Still Search for It The base NES hardware is limited to reading
Have you ever actually beaten a game on a multicart? Or did you just play the first level of Ninja Gaiden 80 times? Let me know in the comments.
(Often modified to work with or without the Zapper light gun)
Getting started with the NES ROM 99999 in 1 is relatively straightforward. Here's a step-by-step guide: