Deltarune Chapter 3 Walkthrough

Chapter Overview

Deltarune Chapter 3, titled Late Night, drops Kris and Susie directly into the TV World — a Dark World born from the Dreemurr family's television. Unlike previous chapters, there is no Light World exploration at the start. The chapter is built around a chaotic variety game show hosted by Mr. Ant Tenna, with the Roaring Knight making a dramatic appearance at the end.

Welcome to TV World

After falling into the Dark World, Kris and Susie reunite with Ralsei. The three are greeted by Tenna, the Darkner form of the family TV, who invites them to participate in his show. The TV World is divided into themed "rounds" that function as mini-games, including cooking, rhythm, and shooting-gallery segments.

As the chapter progresses, Susie realizes Tenna is hiding something. Investigating a barred door reveals Toriel trapped outside the studio in a frozen wasteland. Tenna then forces the party into a final round against their will.

Tenna's Game Show

The bulk of Chapter 3 is a series of mini-games. To progress, complete each round. Your performance determines your rank, which unlocks different backstage doors between rounds:

• S Rank: Unlocks the changing room path to the Shadow Mantle.
• T Rank: A joke rank above S; leads to a T-Posing Tenna Easter egg.
• Z Rank: The lowest rank; also provides an alternate path to the Shadow Mantle backstage area.

You can also spend points at the Ball Machine (found through the B-Door) for useful items like Tension Max, Revive Mints, and armor.

How to Get the Shadow Mantle

The Shadow Mantle is the essential armor for surviving the Roaring Knight secret boss. To earn it:

1. Earn S Rank on all three sections of the gameshow.
2. Enter the S Rank changing room and talk to the NPC in the top-left. Sit through the secret game across three separate visits.
3. On the third visit, defeat the shadow mini-boss.
4. The Shadow Mantle drops as your reward.

The Shadow Mantle provides +1 Defense plus an additional +1 for each completed chapter in your save file, and it grants a 66% defense buff against Dark and Star attacks — the Knight's damage types.

Final Boss: Mr. Ant Tenna

After the party instigates a mass walkout of Tenna's employees, Tenna confronts them directly. The Mr. Ant Tenna boss fight is a frantic collection of his mini-games played back-to-back. The goal is to reach a target score while avoiding strikes that drain health.

Tips:

• Prioritize survival over perfect mini-game scores.
• Learn the patterns of each mini-game; they repeat with increasing speed.
• After the battle, Tenna reveals the Roaring Knight ordered him to host the show.

Secret Boss: Roaring Knight

After Tenna is defeated, the Roaring Knight appears, defeats Tenna, and tries to take Toriel. The party battles the Knight but is canonically defeated. However, a second, fully playable secret encounter can be triggered if you obtained the Shadow Mantle.

The Roaring Knight secret boss is one of the hardest fights in the game. You only need to reduce the Knight to roughly 80% health to drive them away and earn the Chapter 3 Shadow Crystal. Susie's Rude Buster is the most effective attack.

Optional Secrets

• Heart Island: In Round 2, take the boat to the far right instead of left to find a heart-shaped island with a bonus interaction.
• Bonus Room: After Tenna fires everyone, look for two green TV monitors forming a door. Inside is a treasure room and a special Spamton cutscene if you have the Dealmaker or Puppet Scarf.

Chapter 3 Completion Checklist