Can be activated in United States
WindowsScreenshots & trailer
Buy DELTARUNE account
The next adventure in the UNDERTALE series has appeared!
Fight (or spare) alongside new characters in UNDERTALE's parallel story, DELTARUNE...!
Featuring
A massive soundtrack and story written by Toby Fox!
Meet new and endearing main characters, as well as familiar faces like Toriel, Sans, as more. Huh? Papyrus? No, he's busy. Sorry
Smooth and expressive pixel-animation by Temmie. She also has a new hat (in-game)
A linear, chapter-based system that you can pick up from anywhere.
Creative bullet-dodging based battles inspired by games like Touhou and Chrono Trigger.
Jevilishly difficult hidden bosses.
And...
...
... only 1 ending...?Try Chapter 1 and 2 for free now! Chapter 3 & 4... you must buy.FAQ
Is Chapter 4 the last chapter?
Nope! The story is still continuing, and more Chapters will be added for free over time.
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Then when's Chapter 5?
We are aiming for a 2026 release! Meanwhile, we will be periodically releasing information on the development progress of the game.
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Can you pet dogs in the first 2 chapters?
(crying) This FAQ is over! [/dog]
How to activate DELTARUNE on Steam
- 01
Buy & receive your code
Complete checkout — your code lands in your inbox in ~30 seconds, and is always available under Orders in your Gameplug account.
- 02
Open Steam
In the desktop client: top-left menu "Games" → "Activate a Product on Steam…" (or use the web link below).
- 03
Enter your key
Paste the key (format XXXXX-XXXXX-XXXXX) and accept the Steam Subscriber Agreement.
- 04
Install & play
The game joins your library permanently — install it on any machine you sign in to.
Code not working? Contact support — confirmed-invalid codes are replaced or refunded.
