How to Spot a Fake or Reproduction Retro Game
Reproduction cartridges have been around for years, and not all of them are dishonest. Plenty of people knowingly buy repros of Japan-only titles or fan translations that were never sold in their region. The problem is undisclosed repros sold as originals. The good news is that most of them give themselves away long before you need a microscope, and the checks below work on a table at a swap meet with nothing more than good light and your phone camera.
Start with the label
Labels are where counterfeiters cut corners most often, because printing at home is cheap and offset printing is not.
- Zoom in on the artwork. Use your phone camera at maximum zoom, or a jeweller's loupe. Genuine labels show fine, clean detail. Many reproductions show visible pixelation, jagged edges on text and logos, or the fuzzy irregular spray pattern of an inkjet printer.
- Look at the paper and finish. Original labels are usually a specific thickness and sheen for that system. A label that feels like glossy photo paper, or one that is noticeably thicker than the labels on carts you already own, is worth a second look.
- Check the edges and corners. Home-cut labels often have slightly rough or square-cut corners, sit crooked in the recess, or have a visible gap on one side.
- Compare colours side by side. Reds and skin tones are the usual giveaways. Hold the cart next to a known-genuine copy of any game from the same system rather than comparing against a photo online, since screens lie about colour.
- Read the small print. Copyright lines, ratings marks and the manufacturer's seal are frequently blurry, misspelled or subtly the wrong font on fakes.
One caution: a genuine cartridge can have a replacement label. A crisp new label on an obviously old shell means the label is not original, but it does not by itself prove the board inside is fake. Treat it as a prompt to keep checking.
Check the shell and the screws
Screw type is one of the fastest tells on Nintendo hardware. Original NES games and SNES games are closed with a 3.8 mm security screw, sometimes called a gamebit, and Game Boy family carts including Game Boy Advance games use a tri-wing screw. If you are looking at a cart from one of those systems and the screw takes a standard Phillips driver, the shell is almost certainly aftermarket.
This test does not apply everywhere. Many Sega Genesis and Mega Drive cartridges use ordinary Phillips screws from the factory, and some carts across various systems are snapped or glued rather than screwed. Know what the original closure for that system looks like before you draw a conclusion.
Other shell clues:
- Molded text. Original shells have text and part markings molded into the plastic, usually on the back. Reproduction shells often have blurry, shallow or missing molded text.
- Plastic colour and texture. Aftermarket grey is rarely the right grey. Look for a shell that is glossier, more brittle-looking, or a different shade from the rest of your collection.
- Seam fit. Halves that do not sit flush, or a shell that creaks when squeezed, suggest a re-shell.
If you do decide to open a cartridge, use the correct bit. Attacking a security screw with a flathead strips the head and gouges the plastic, and once it is stripped you have a much bigger job. If you do not own the right driver, leave it closed and rely on the external checks.
What the board should look like
Opening a cart is optional, but it is the most reliable check. On an original board you should expect factory-quality machine soldering, the manufacturer's markings printed on the PCB, and chips with clean laser-etched or printed labels that match each other in style and age.
Common reproduction signs:
- A bright, modern-looking green PCB in a cartridge that supposedly dates from decades earlier.
- Hand-soldered joints, blobby solder, flux residue, or jumper wires.
- A single modern flash chip where the original design used multiple mask ROMs.
- Chips with sanded-down tops, mismatched fonts, or labels that look printed on rather than etched.
- A save battery that has clearly been added, or an empty battery footprint on a game that saves.
Do not touch the board with bare fingers any more than you have to, and never scrape at a chip label to test it.
How it behaves on real hardware
Some repros look convincing and still fail in use. Load the game and check that saving works, then power off, wait a minute, and power back on to confirm the save survived. Battery-backed saves that vanish immediately are a classic repro symptom. Watch for wrong region behaviour, missing intro screens, an anti-piracy warning appearing part-way in, corrupted audio, or a title screen that flickers where the real game is stable. If you have a cart dumper, comparing the dump against a known checksum is definitive, though that is a hobbyist-level step rather than something you can do at a stall.
Listing and seller red flags
- A seller offering several copies of the same hard-to-find title, all in similar condition.
- Stock photos, or photos that show only the front of the label.
- Wording like "custom", "collector's edition", "aftermarket", "for enthusiasts" or "not original" buried in the description.
- A refusal to photograph the back of the cart, the screws, or the board.
- A cart whose label language, rating mark and region do not agree with each other.
Ask directly for a photo of the back of the cartridge and, where relevant, the board. An honest seller will not mind.
Looking after the genuine ones
Once you have a cart you trust, clean the contacts properly. Use a cotton swab lightly dampened with 99% isopropyl alcohol, wipe along the contacts until the swab comes away clean, and let it dry fully before inserting it. Do not blow into the cartridge. That folk remedy pushes moisture and saliva onto the contacts and accelerates corrosion, which is the opposite of what you want. If a game still will not boot after a proper clean, the fault is more likely in the console's cartridge connector, and replacing or reworking that means opening the console, which is beyond a basic clean.
None of these checks is conclusive on its own. A crisp label, correct screws, a factory board and correct save behaviour together are strong evidence. When two or three signs point the same way, trust them, and when in doubt buy from someone who will let you inspect the cart before you commit.
