Updated: June 25, 2026
We added all the Deltarune piano codes!
Chapter 4 of Deltarune has been out for quite some time, but even now, many players are struggling to figure out the correct piano codes to complete that segment. If you’re tired of mashing random buttons and just want to move the story along, our Deltarune Piano codes guide has you covered!
All Deltarune Piano codes list
Chapter 4 features four Deltarune piano puzzles, and you’re tasked with finding scattered note sheets and playing them on separate pianos. If you already know the correct notes, you can skip the search and input them directly. Afterward, check out our Deltarune Chapter 5 walkthrough for the latest Undertale saga chapter!
Related: How to activate the Power of the Mysterious Structure and climb the vines in Deltarune
Deltarune Piano code #1
The first piano you encounter can be found early in the Dark Sanctuary, just past the entrance area. Input the notes in the following sequence:
←, ↓, ←, ↓, ←, → (left, down, left, down, left, right)
Deltarune Piano code #2
You’ll find the second piano while on route to the Old Man’s Study. Type in the Deltarune Piano code to solve the second puzzle:
↑, ↑, ↓, ↓, ←, ←, →, ↑ (Up, Up, Down, Down, Left, Left, Right, Up)
Deltarune Piano code #3
Once you’ve gained access to the Library, you’ll find a Small Piano area that leads to the Dark Zone. Before you can access the Dark Zone, approach the piano and type in the following notes:
←, ↓, ←, →, ↓, ↓, →, → (Left, Down, Left, Right, Down, Down, Right, Right
Deltarune Piano code #4
Use the ClaimbClaws to reach the part of the Library where the Golden Piano is located. Afterward, type in the following combination to access the the Study’s fireplace and unlock the Hammer of Justice boss fight:
↑, •, ↑, ←, ↓, •, →, ↓, ←, • (Up, Dot, Up, Left, Down, Dot, Right, Dot, Right, Down, Left, Dot)
Deltarune Official Wiki and Discord server information
The Deltarune Wiki is an all-encompassing encyclopedia covering everything Deltarune, and whatever you’re looking for can most likely be found there. There’s also an official Discord server where you can chat with other players, learn about news and updates, and maybe even find out about any upcoming Deltarune piano puzzles!
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