If you want to unlock the full secret ending in Deltarune Chapter 3, there’s a special path you can take. You’ll need to earn high scores, complete tough minigames, and collect three important items. Along the way, you’ll uncover hidden areas and take on a powerful secret boss. This guide will walk you through everything you need to do, step by step, to reach that hidden ending.
How to Get the Chapter 3 Full Ending
If you’re trying to unlock the secret ending in Deltarune Chapter 3, you’ll need to earn three S-ranks during Tenna’s game show. Each S-rank gets you closer to opening a mysterious door marked with an “S.” Behind it, there’s a hidden minigame that rewards you with some special items.
Here’s what you’ll get as you progress:
- Ice Key (after getting your first S-rank)
- Shelter Key (after your second S-rank)
- Shadow Mantle (after your third S-rank)
The first two keys are important because after collecting the keys, you will get the Shadow Mantle, which you must equip if you want to stand a chance against the secret boss of the chapter, the Knight.
One more thing: when you enter the secret minigame, you’ll be playing as Kris alone. No Susie. No Ralsei. It’s just you, so be ready to handle everything on your own.
How to Get Inside the S-Room
The S-room, where all three secret minigames are found, is inside the Green Room. To get in, you either have to earn an S-rank in Tenna’s game show, which means performing perfectly or you can skip the hard part and pay 1,500 points to the Point Merchant. Inside the S-room, you’ll see three portals, each leading to a different solo challenge that you’ll need to complete on your own.
How to Get the Ice Key
The first secret minigame gives you the Ice Key, which is one of the three important items needed for Deltarune’s secret ending. To complete it, start by picking up a sword at the beginning of the challenge. Then, defeat every enemy you come across fish, flowers, and the purple monsters, to earn EXP. You need to hit Level 4 to unlock the next part of the path.
Once you’ve leveled up, look for a hidden trail behind two cactus plants. Cut down the trees blocking your way, and at the end of the path, you’ll find a chest with the Ice Key inside. Just make sure you don’t miss any enemies if you do, you won’t be able to level up or open the path forward.
How to Get the Shelter Key
In the second secret minigame, you will get a Shelter Key as a reward, which you’ll need to open a hidden shelter. This challenge focuses more on solving puzzles, moving carefully, and finding your way through tricky areas. Even though it’s less about fighting and more about thinking your way through, the Shelter Key is just as important as the others if you want to reach the secret ending.
How to Get the Shadow Mantle
The last and most important item you’ll need is the Shadow Mantle. It’s a powerful defensive item that protects you from being instantly defeated in the final battle. You must have it if you want to stand a chance against the secret boss, The Knight. To get the Shadow Mantle, you’ll need to complete the third and toughest minigame so be ready for a real challenge. Once you’ve collected this along with the Ice Key and Shelter Key, you’ll have everything you need to take on the final part of the chapter and unlock the secret ending.
How to Use the Ice Key and Shelter Key
The Ice Key and Shelter Key each unlock hidden areas that are important for the secret ending. The Ice Key opens up a frozen zone filled with story details and useful items that connect to the final part of the chapter. The Shelter Key gives you access to a quiet, hidden area that reveals more about the deeper mysteries in the story.
Once you’ve explored both areas, head back to the S-room and interact with the structure in the center to start the final sequence. Just make sure you equip the Shadow Mantle before moving forward; it’s the only way to survive the battle.
How to Beat The Knight
The final boss of the secret path is The Knight, a mysterious and powerful figure tied closely to Deltarune’s bigger story. This battle is extremely tough, and without the Shadow Mantle equipped, you’ll be at risk of being knocked out instantly. The fight is fast and full of unpredictable attack patterns, so stay on your toes. It’s also packed with story content, giving you new dialogue and an alternate ending that reveals more about the world of Deltarune.
To face The Knight, you must have collected all three key items and be wearing the Shadow Mantle. Make sure Kris is set up for survival with healing items and your best build. Finishing all three trials not only puts your skills to the test it also unlocks the secret ending in Chapter 3.
