The folk at Baltimore Knife and Sword have recreated the Fierce Deity Sword from The Legend of Zelda: Majora's Mask.
The sword, which is wielded with two hands, is the only weapon available to the Fierce Deity transformation in The Legend of Zelda: Majora's Mask. Because of it, Link is unable to use a shield in battle, but makes up for the lack of defense with immense power, range and the ability to unleash sword beams.
As a double helix sword, it's certainly a tricky one to forge in reality, and a task recently undertaken for the web series Man at Arms: Reforged.
What other game weapons would you like to see forged in reality?