Welcome to the Undertale Wiki!

We are the most informative Undertale encyclopedia on Fandom, currently maintaining 325 articles and 1,303 files, and you can help!

You can help this wiki by watching recent changes, reverting vandalism, and removing incorrect or outated information.
Please be sure to thoroughly read our Rules and Guidelines before you begin editing. Thank you!

This wiki recommends refraining from reading most, if not all, of the articles to avoid spoilers unless you've reached all three main endings.

About Undertale

Undertale is a role-playing game where you don't have to kill anyone! It was created by Toby Fox and was released on September 15, 2015.

The demo can be downloaded and played from the official site for free, and the full game can be bought on Steam, GOG.com, Nintendo Switch, Xbox, and PlayStation.

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Know anything about the series we don't? Edit the wiki and add it in! Found something that doesn't belong on the wiki, such as vandalism? Feel free to help clean it up!

Feel free to add anything relevant and accurate to the pages. Anything that is added that is false will be removed; if you add information, back it up. Please do not make any unnecessary changes to the wiki. Please read and observe the Rules & Guidelines to avoid adding incorrect edits. If anyone is caught vandalizing, they will be immediately banned.

Note that the wiki is still a work-in-progress. Check out this listing for a list of all articles, wanted pages for a list of articles that require creation, short pages for a list of articles that require expansion and Recent Changes for a list of recent events on the wiki.