In The Legend of Zelda: Ocarina of Time it is possible to permanently miss items due to the design of the game's progression. The game features moments that, once taken by the player, mean there is no going back. There are some items and upgrades that cannot be obtained once certain parts of the game are completed, such as obtaining the Master Sword.
This is a common feature in gaming, where progression means that returning to certain areas can be blocked. This can be different areas of a level or a change in the state of the world map. For example, some of Elden Ring's essential items can be missed and become permanently unobtainable. Sometimes missed items can be collected by restarting a level, but in some cases, the only way to pick these up is to restart the entire game, particularly in older games with limited save slots.
Related: The Legend Of Zelda's Most Useless Items For Link To Use
Ocarina of Time mostly avoids missable items, with the ability to skip back and forth through time allowing the player to explore at their will. However, certain items can be lost if not collected at the right time or in the right order. Most notably, the Deku Nut upgrade can be unobtainable due to a glitch, making it the most important missable item. As an old game, this is not Ocarina of Time's only glitched item. Others such as the Dungeon Map in Jabu-Jabu's belly are simply a matter of timing, so there are certain moments to look out for.
The only upgrade that can be missed is the Deku Nut upgrade, obtained from a Deku Scrub in Kokiri Forest when the player speaks to it while wearing the Mask of Truth. This increases the carrying capacity of Deku Nuts from 30 to 40. However, if the player has already obtained the Poacher's Saw
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