Undertale

About Undertale

Undertale is a beloved indie RPG where a child falls into the Underground, a world of monsters, and must find a way back to the surface. Its standout twist is the combat: you can fight enemies, but you can also spare every one of them, dodging their attacks in a bullet-hell box and talking your way to peace. Your choices shape the story, the characters, and which of its very different endings you reach.

Game Info

Genre: Indie RPG
Developer: Toby Fox
Publisher: Toby Fox
Release Year: 2015
Platform: Browser (HTML5)
Mobile Support: No
Difficulty: Varies

How to Play Undertale

Explore the Underground, solve puzzles, and talk to its quirky inhabitants as the story unfolds. In battles, dodge incoming attacks by moving your soul inside the bullet-hell box, then choose to FIGHT or use ACT and MERCY to spare foes. How you treat monsters—killing or sparing—determines your path toward the Neutral, Pacifist, or Genocide endings.

Controls

Arrow Keys Move / control your soul in battle
Z / Enter Confirm / interact
X / Shift Cancel / back
C Open menu

Pro Tips & Strategies

Use ACT options to learn how to spare each monster nonviolently if you want the Pacifist route.
Watch attack patterns in the battle box—most enemy bullets are dodgeable once you learn the rhythm.
Save often; Undertale remembers your choices and some are permanent for a run.
Talk to everyone and explore fully—the writing and hidden interactions are a core part of the game.
For boss fights, prioritize survival and pattern-reading over rushing; many are designed to be outlasted.

Undertale FAQ

Can you really beat Undertale without killing anyone?

Yes—the Pacifist route lets you spare every monster using ACT and MERCY while dodging their attacks, leading to the game's best ending.

How does combat work in Undertale?

During battles you move your soul inside a box to dodge bullet-hell attacks, then choose to FIGHT or spare enemies with ACT and MERCY.

What are the different endings in Undertale?

Your choices lead to Neutral, True Pacifist, or Genocide endings, each shaped by whether you spare or kill the monsters you meet.