The Legend of Zelda: Four Swords Anniversary Edition on Nintendo 3DS is free via the 3DS eShop for a limited time.
"Just go to Nintendo eShop on your Nintendo 3DS or 2DS from Thursday, Jan. 30 9am (PST) until Sunday, Feb. 2 at 11:59pm (PST) to download this awesome adventure for free."
The link included is to Nintendo’s website, but the promotion is redeemed only on your 3DS’s eShop.
https://www.nintendo.co