Skip to ContentGo to accessibility page
OpenStax Logo
Biology 2e

Undertale Python

Biology 2e1.1 The Science of Biology

Undertale Python

Toby Fox built Undertale with love, determination, and a deep understanding of game design. Python won’t magically give you that. But it will give you a clean, powerful, and friendly language to experiment, fail, and try again.

But for programmers—especially those learning to code— Undertale represents something else: the ultimate "learner project." And at the heart of many of these fan engines, clones, and re-imaginings is one language: . undertale python

if state == "MENU": draw_menu() if selected == "FIGHT": state = "FIGHT_PHASE" damage = random.randint(1, 5) Toby Fox built Undertale with love, determination, and

The game constantly remembers your actions. Did you spare Toriel? The game needs to know. Using a or a simple Python dictionary Toby Fox built Undertale with love

PreviousNext
Order a print copy
Citation/Attribution

This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's permission.

Want to cite, share, or modify this book? This book uses the Creative Commons Attribution License and you must attribute OpenStax.

Attribution information
  • If you are redistributing all or part of this book in a print format, then you must include on every physical page the following attribution:

    Access for free at https://openstax.org/books/biology-2e/pages/1-introduction

  • If you are redistributing all or part of this book in a digital format, then you must include on every digital page view the following attribution:

    Access for free at https://openstax.org/books/biology-2e/pages/1-introduction

Citation information

© Feb 3, 2026 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License . The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.