The Ice Key in Deltarune Chapter 3 is one of the most important secret items tied to unlocking the game’s hidden ending. However, finding it requires entering a hidden minigame, completing specific objectives as Kris alone, and navigating a cactus-guarded path deep within the map. Missing a single step can cause players to miss the key entirely or force them to restart the chapter.
In this guide, we’ll walk through everything you need to know about where to find the Ice Key, how to access the secret S-rank room, activate the minigame, and reach the hidden chest that contains this essential item.
How to Unlock the S-Rank Room
Before you can even begin the hunt for the Ice Key, you must gain access to the S-room in the Green Room. This locked chamber is the gateway to all three hidden minigames in Chapter 3, including the one that contains the Ice Key.
Steps to Unlock:
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Earn an S-Rank (above 1500 points) in the first round of Tenna’s game show.
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Once achieved, head to the Green Room, where a large door marked with the letter “S” will now open.
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If you fail to get an S-rank, the Point Merchant allows you to buy entry for 1500 points.
Once inside, you’ll see portals to several rooms. To find the Ice Key, take the left portal, which leads to a console-controlled minigame.
How to Activate the Secret Minigame
When you enter the left chamber in the S-room, you’ll find a console with an inactive screen and an NPC standing in front of it.
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The console needs a controller to start the game.
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Leave the room briefly and pick up the Odd Controller from the floor outside.
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Return to the console and interact again to launch the minigame.
Now you’ll be transported to a solo challenge.
Minigame Overview: Kris Solo Mode
In this special mode, you control Kris alone, with no Susie or Ralsei to help. The map resembles the first round of Tenna’s game show but with a darker, non-TV-show atmosphere.
The goal here is to find a weapon, defeat all enemies, and unlock a hidden path that leads to the Ice Key.
How to Find the Sword in the Minigame
To begin combat, you must first find the sword weapon hidden in a lower section of the map.
Sword Route:
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From the fish pond, go:
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Left → South → South → East → South.
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You’ll reach a mail room-like basement.
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Interact with the glowing object to equip the sword.
Now Kris can fight enemies and slash obstacles.
How to Level Up and Defeat All Enemies
To open the hidden Ice Key path, Kris must reach Level 3 by defeating every enemy in the minigame.
Enemy Types:
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Fish: Swim in shallow ponds and small water areas.
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Flower Monsters: Passive-looking plants that spring into action.
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Purple Ghosts: Appear suddenly in tighter corridors.
Each kill gives experience, and reaching Level 3 is essential to proceed.
Tip: If you miss a single enemy, you won’t be able to unlock the next area. Backtrack carefully and make sure all enemies are cleared.
Once you hit Level 3, Kris gains the ability to cut through cactus barriers.
Where to Find the Ice Key
With cactus-cutting unlocked, head to the area with two cacti standing side by side.
Steps to Reach the Ice Key:
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Return to the area with the twin cactus gate.
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Slash through both cacti to open the new path.
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Follow the forested path forward.
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Slash through multiple trees across several screens.
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Eventually, you’ll find a chest at the end containing the Ice Key.
The key is required for unlocking a hidden section of the map and progressing toward Chapter 3’s secret ending.
Important Notes About the Minigame
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This challenge does not affect pacifist routes.
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The Ice Key is one of three essential items—along with the Shelter Key and Shadow Mantle—needed to access the secret boss, The Knight.
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If you make a mistake or miss enemies, you may need to restart the minigame, or worse, replay the chapter if you forget to save beforehand.
Recommendation: Always save before attempting the S-rank or entering the S-room to avoid losing progress.
Final Thoughts
Finding the Ice Key in Deltarune Chapter 3 is a rewarding but tricky challenge. From achieving an S-rank in Tenna’s game show to navigating solo as Kris and unlocking a cactus-hidden forest path, each step is layered with precision. But the effort pays off. With the Ice Key in hand, you’re one step closer to unlocking the game’s biggest secrets—including the path to the Shadow Mantle and the final boss encounter with The Knight.
If you’re aiming for 100% completion and don’t want to miss out on the secret ending, mastering this minigame is a must.