Between now and February 2nd, 3DS and 2DS owners can visit the Nintendo eShop and download the classic adventure (with a few new features) for free.
The original 2003 Game Boy Advanced version of Four Swords came packaged with A Link to the Past, but could only be played with other people who also had the game and with the appropriate connection cables. In the 3DS/2DS update, the multiplayer options are still intact, each player will need a copy of the game and their own handheld, but gamers now have the option to play solo, switching between two different Links in order to solve puzzles.
Additionally, a new area called the Realm of Memories has been added after players conquer Four Swords. The Realm of Memories will give gamers the opportunity to revisit parts of older titles.
Now watch this trailer from Four Swords Anniversary's 2011 release with Robin Williams and his daughter, Zelda.