This is a custom interface that allows the 3DS to run DS ROMs (.nds files) directly from the SD card.

One of the biggest perks of playing on a 3DS via homebrew is the ability to use "Widescreen" cheats, which allow the game to fill the 3DS's top screen without stretching the image. Is there a "3DS Remake" QR Code?

Since the game is copyrighted material, official QR codes for the full game do not exist on public storefronts. Why Chinatown Wars is Best on 3DS

While many fans have long searched for a way to play on the Nintendo 3DS using a QR code , it is important to clarify a bit of "handheld history" first: Rockstar Games never officially released a 3DS-specific version of the game.

If you are using a modified 3DS, you won't typically use a QR code for the game itself. Instead:

In the homebrew community, "Remote Install" via QR code is the fastest way to get apps without taking the SD card out of the console. How to Play Chinatown Wars on 3DS

Why are people looking for a GTA Chinatown Wars 3DS QR Code?

You may see websites claiming to have a QR code for a "3DS HD Remake." These are often: