Deltarune Chapter 3 Guide: Surviving the TV World and That Secret Boss

So, you finally made it to the TV World. Honestly, after that cliffhanger ending in Chapter 2, seeing Kris rip their soul out just to open a window and turn on the TV felt like a fever dream. Now that Chapter 3 is actually here—bundled alongside Chapter 4—it’s a lot weirder than anything we saw in Cyber World. It’s cramped, it’s glitzy, and it’s basically one giant, dangerous game show.

If you're looking for a solid deltarune chapter 3 guide, you've probably realized that this chapter doesn't play by the same rules. Toby Fox really leaned into the "strange" vibe here. Instead of wide-open fields, you’re navigating through soundstages and green rooms.

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The stakes are higher too. You aren't just closing a fountain; you're trying to keep your "audience" happy while dodging some of the most aggressive bullet patterns we've seen yet.

Getting Through the TV World Puzzles

The structure of Chapter 3 revolves around "Rounds" in Tenna's show. You aren't just walking from point A to point B. You’re performing.

Round One: The Cooking Segment

The first big hurdle is the cooking minigame. It feels like a chaotic mix of a rhythm game and a plate-spinning act. Basically, you need to catch food dishes while avoiding the fire.

Pro tip: Don’t try to catch everything. It's better to drop a few dishes than to take a hit from the burners and lose your multiplier. If you want that S-Rank—and trust me, you want the S-Rank—focus on the Golden Dishes. They show up toward the end of the segment and boost your score significantly.

The Green Room Breaks

Between rounds, you’ll end up in the Green Room. This is your hub. You’ll see characters like Queen and even Swatch hanging out here if you recruited them.

Check the vending machine south of the main area. You can buy the Toxic Axe for Susie there for 80 points. It’s hands-down the best weapon for her in this chapter. It gives a +4 ATK boost, which makes the upcoming "unwinnable" fights a lot more winnable.

The Secret Boss: Finding the Roaring Knight

Okay, let’s talk about what everyone is actually searching for. The secret boss. In Chapter 1 we had Jevil, and in Chapter 2 we had Spamton NEO. Chapter 3 gives us a direct confrontation with the Roaring Knight.

But here’s the kicker: you don't find them through a hidden key in a basement this time. It’s all tied to your performance in the TV show.

Step-by-Step to the Shadow Mantle

To even stand a chance against the Knight, you need the Shadow Mantle. Without it, you’ll likely get wiped in three turns.

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1. Get S-Rank in Round 1 and Round 2: This is non-negotiable. If you mess up, there’s a Pippin NPC south of the Green Room who will sell you an S-Rank for 1500 points, but that’s a massive grind.
2. Enter THE ROOM: Once you have S-Rank, go to the top-left of the S-Rank room. Talk to the NPC guarding the door.
3. The Secret 8-Bit Game: Inside, you’ll play a top-down Zelda-style minigame. You have to kill every enemy in the area. It feels wrong—kinda like a Snowgrave vibe—but it's the only way.
4. Find the Ice Key: After you clear the enemies, you can cut down the trees in the forest area. Hidden in a chest is the Ice Key.
5. The Final Visit: You have to repeat this process and enter the room a total of three times across the chapter. On the third visit, you’ll fight a shadow mini-boss. Beat it, and the Shadow Mantle is yours.

Strategy for the Roaring Knight Fight

This is a "Showdown." The Mercy meter is literally crossed out. You can’t pacify your way out of this one. You have to fight until the Knight retreats.

The Knight uses "Dark" and "Star" element attacks. If you followed the steps above, give the Shadow Mantle to Susie. She’s your tank and your primary damage dealer.

• Susie's Role: Spend every bit of TP on Rude Buster. If you time the Z/Enter press right before the blast hits, you deal massive extra damage.
• Kris and Ralsei: Mostly, they should just Defend. This builds TP faster. Only use Ralsei for a "Heal Prayer" if Susie’s HP drops below 40.
• The Damage Threshold: You need to deal roughly 1850 damage to trigger the final phase.

Honestly, the Knight’s patterns are fast. They summon "smiling critters" and fire fireballs in rotating circles. Stay toward the bottom of the box; it gives you a split second more to react to the dash attacks.

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What Most People Get Wrong About the "Weird Route"

Is there a "Snowgrave" equivalent in Chapter 3? Sort of. People call it the Egg Route.

It’s not as straightforward as just telling Noelle to freeze everyone. It involves a specific stealth section and choosing "Cheater" when prompted by Tenna. If you do it right, the dialogue gets noticeably darker, and the music shifts to that creepy, slowed-down ambient drone.

Keep an eye out for a cracked brick on the right side of the map during the "Legend of Tenna" round. Interacting with it gives you the Chapter 3 Moss. You know the drill—Kris has to eat the moss. It’s tradition.

Finishing Your Run

Once you finish the chapter, don't forget to head back to Castle Town. If you recruited everyone, you can find a new "TV" building on the far left. There’s a note there with a code that hints at what’s coming in Chapter 5.

Your next steps:

• Check your inventory for the Shadow Crystal. Seam back in Chapter 1’s shop will have new dialogue for it.
• If you missed the S-Ranks, consider reloading a save before the finale. The Roaring Knight fight is the highlight of the chapter and you don't want to skip it.
• Transfer your save to Chapter 4 immediately. The items you got from the Ball Machine (like the Tenna Tie) are incredibly useful for the early puzzles in the next chapter.