The Legend of Zelda: Four Swords Anniversary Edition released today free of charge for the Nintendo DS and 3DS. You will be able to find it on the DSi Shop and eShop for a limited time only from 9/28/2011 until 2/20/2012.
The Legend of Zelda: Four Swords Anniversary Edition is a special commemorative version of the 2003 Game Boy Advance release: The Legend of Zelda: A Link To The Past & Four Swords. In it you will embark on an exciting multiplayer adventure filled with action and puzzles as you work to save princess Zelda from the evil Vaati.
You can play with up to four friends at once as long as each player has a copy of the game installed on their Nintendo DS, 3DS system.
Click the source link below for more information from the official site!