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That’s where the 2021 QR code frenzy began. The code, typically generated via FBI (a popular 3DS homebrew app), pointed to a custom CIA file—a repackaged version of the original DS ROM running through TWiLight Menu++ or nds-bootstrap . In other words, it wasn’t a native 3DS port, but rather a slick, one-scan installation of the 2009 DS classic, optimized to run on a New 3DS or 2DS with improved load times, save states, and (unofficially) second-analog mapping.
Here’s an interesting write-up on the subject : Unlocking a Classic: The Curious Case of GTA: Chinatown Wars on 3DS via QR Code (2021) In the twilight years of the Nintendo 3DS’s life cycle—long after eShop prominence had faded and homebrew communities thrived—a peculiar digital artifact made the rounds in forums like GBAtemp and Reddit’s r/3DShacks: a QR code claiming to deliver Grand Theft Auto: Chinatown Wars directly to a modded 3DS in 2021.
Today, that QR code still floats around Internet archives. Scan it on a stock 3DS? Nothing. Scan it on a Luma3DS-enabled device with FBI installed? Welcome to Liberty City’s underworld—no strings attached, just a top-down crime epic in your pocket. The 2021 QR code for GTA: Chinatown Wars on 3DS wasn’t official—it was a homebrew workaround to run the DS classic on modded hardware. It became a symbol of fan dedication and digital preservation in the 3DS’s final years.