If the player completes the game, they will unlock a hard mode, called Master Quest. Originally, shortly after the original Nintendo 64 version of "The Legend of Zelda: Ocarina of Time" was released, development began on a pseudo-remake of the game dubbed 'Ura Zelda,' or literally 'Another Zelda.' This game was designed for the 64DD, an expansion for the Nintendo 64 that ultimately met with commercial failure. Eventually, this version of the game was released in a bundle as "The Legend of Zelda: Ocarina of Time- Master Quest" on the GameCube re-release. The Nintendo 3DS remake contains updated versions of both games, although the Master Quest mode is mirrored (for instance, locations to the East are now on the West side of the map).
The Water Temple from The Legend of Zelda: Ocarina of Time (1998) was an infamously difficult dungeon because of its complex layout and the need to change the water level several times to reach certain areas. A complicating factor was that to navigate the temple, frequent use of the Iron Boots was necessary; since these were listed on the equipment screen, the player constantly had to access the pause screen to select or deselect the boots. In the remastered version, the Iron Boots have been changed to an assignable item that can be easily put on or off during the game, there are glowing markings on the walls to help point the way, and the entire temple was made brighter.