: You can often find collections of "Nintendo 3DS Decrypted ROMs" hosted on the Internet Archive , which frequently include European retail titles.
For (EUR) on the Nintendo 3DS, you can find a decrypted version suitable for emulators like Citra through community-maintained libraries.
: If you have an encrypted file (often in .cia or .3ds format), you can use the Batch CIA 3DS Decryptor to convert it into a decrypted format that Citra can read.