Play DELTARUNE
Online

DELTARUNE is the dark, funny role-playing game by Toby Fox, the creator of Undertale. It follows Kris, a quiet human, who falls into a strange world with classmates Susie and Ralsei. DELTARUNE mixes turn-based combat, bullet-dodging, and a story where your choices matter more than you expect.

Chapters 1 and 2 are officially free, and the full game is sold on Steam, Nintendo Switch, and PlayStation. On this site you can play DELTARUNE online in your browser with no download at all — a fast, free way to start the Dark World adventure.

Playing DELTARUNE online is the fastest way into the game. There is nothing to download, no account to sign up for, and no install to wait through. You can play DELTARUNE online on a laptop, a desktop, or a phone browser.

• Instant start — open a chapter and play in seconds.
• Full game intact — save crystals, secret bosses, and the whole story are all here.
• Play anywhere — works on PC and mobile browsers.

Whether you want a quick boss fight or a complete playthrough, playing DELTARUNE online feels just like the desktop version.

1. Pick a chapter from the grid above — start with Chapter 1.
2. Tap the play button to launch the game in your browser frame.
3. Use the in-game save crystals to keep your progress between sessions.
4. Stuck on a secret boss? Open our guides before you fight.

DELTARUNE tells its story across chapters. Chapter 1 sends Kris, Susie, and Ralsei into the Dark World, where Card Castle waits and Jevil hides behind a secret door. Chapter 2 moves to the neon Cyber World ruled by Queen, where Noelle and Berdly join the party and Spamton NEO waits in the basement. Chapter 3 continues the journey into a strange world of TV and static, and Chapter 4 is still on the way.

Each chapter of DELTARUNE stands alone enough to jump in, but playing in order gives you the full Dark World story. You can play DELTARUNE online chapter by chapter right here, free, with no download.

DELTARUNE is famous for its secret bosses. Jevil hides behind a locked door in Chapter 1, and unlocking him means hunting down three key pieces and the tomb stones. Spamton NEO waits in the Chapter 2 basement, one of the hardest fights in the game.

The Snowgrave route is the darkest alternate path, where Noelle's choices take a chilling turn. Our guides cover how to beat Jevil, how to beat Spamton NEO, and the full Snowgrave route. You can also test your moves against both bosses in our Jevil and Spamton NEO fight simulator before the real battle.

The cast is one of the best parts of DELTARUNE. Kris is the silent human you control, Susie is the axe-swinging ally who starts as a bully, and Ralsei is the fluffy prince who believes in pacifism. Noelle, Lancer, and Queen round out a group that is equal parts funny and heartbreaking.

Spamton and Jevil are the chaos agents — secret encounters with their own twisted rules. Browse the characters and enemies pages to learn every name, role, and secret in DELTARUNE.

Chapters 1 and 2 of DELTARUNE are officially free, and Chapter 3 is free in the browser here as well. The full game is also sold on Steam, Nintendo Switch, and PlayStation for the complete official experience with cloud saves and controller support. Playing DELTARUNE online is the quickest free option, while the paid versions add official support and updates.

If you like Undertale, you will love DELTARUNE. It has the same bullet-dodging combat and fourth-wall humor, wrapped in a stranger, sadder story. Fans of turn-based RPGs will enjoy a battle system where you can spare enemies instead of fighting. Newcomers can start with Chapter 1 and learn the rules as they go.

Because you can play DELTARUNE online for free with no download, there is no reason not to try the first chapter and see if the Dark World pulls you in.