Deltarune: Acid Room Puzzle Guide

When you’re exploring the Cyber World in Chapter 2 of Deltarune, you’re sure to come across the Acid Tunnel of Love. Here, the party boards a swan boat and rides it until they run into a blue hand. This opens up a new area where you have to solve a couple of puzzles in the acid rooms. Like all other puzzles in Deltarune, these can get a bit tricky and challenging. This guide covers how you can clear the acid room, including the acid room mouse puzzle, and raise the bridge to continue your journey in Deltarune.

All Ball Machine Rewards, Fortunes, & Secrets in Deltarune Chapter 3

Players who are trying to decide if they should spend points on Deltarune Chapter 3’s gacha machine can find all the information they need here.

How To Clear the Acid Room in Deltarune Chapter 2

When you get off the swan boat and explore the new area, you’ll eventually see Red and Blue Houses. These houses act as switches. Each house is connected to red and blue lines, which control the tiles on the board. When you interact with a house, it changes color and activates a different set of tiles, opening new paths.

From the first house, create a path to go straight up. There, you’ll run into a fight with a Werewire. Defeat this enemy to get access to the area with a treasure chest. You will get a Revive Dust from this chest.

Come back down and use the houses to create paths and move east across the water. On the next screen, you’ll find a Swatchling trapped on an island.

If you free them by solving the path puzzle without breaking the vase near the exit path, they’ll reward you with a treasure chest.
But if you smash the vase, they’ll simply leave without giving you anything.

After helping the Swatchling, go back west, then create a path to go north. In the next acid room, there’s another mouse puzzle waiting for you.

Acid Room Mouse Puzzle Guide

This puzzle is a lot similar to the Annoying Mouse Room puzzles in Chapter 2, but with the new house mechanic. The room features two treasure chests and a series of houses that can be toggled between red and blue. The goal is to guide mice to two gray houses on the right side of the screen.

When you enter the room, hit the second Red house to turn it Blue. Then, use the traffic light to release the mise. They’ll go straight into the top house on the right.

Next, hit the third house to turn it Blue. Release the mice again, and they’ll be guided to the second house on the right. The house colors should be in this combination: Red, Blue, Blue, Red.

Once both the red and blue house goals are met, you’ll get a message saying the bridge was raised. After you solve the mouse puzzle, head left to reach a new screen with a lever. Pull the lever to trigger an event, then follow the path downward to return to the swan boat.