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UCME File - What is a .ucme file and how do I open it?

Learn about .UCME files and view a list of programs that open them.

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Overview

What is a UCME file? A UCME file is a map used by Sil Games Undercreator, a tool for building Undertale ‑style fangames. It contains information about a map in a proprietary binary format, which includes paths a player can navigate during gameplay.

More Information Undercreator is a tool that lets users build games using visual drag‑and‑drop editors without writing any code, which you can also play in Undercreator. UCME files are one of several game data file types Undercreator uses. Other examples include .UCED files for encounters and .UCAT files for attacks.

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VerifiedVerified by FileInfo.com The FileInfo.com team has independently researched the Undercreator Map file format and Windows apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified. If you would like to suggest any additions or updates to this page, please let us know .

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DeveloperSil Games
Popularity2.0 | 1 Vote

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.UCME File Extension

Undercreator Map File

DeveloperSil Games
Popularity
2.0  |  1 Vote
 

What is a UCME file?

A UCME file is a map used by Sil Games Undercreator, a tool for building Undertale ‑style fangames. It contains information about a map in a proprietary binary format, which includes paths a player can navigate during gameplay.

More Information

Undercreator is a tool that lets users build games using visual drag‑and‑drop editors without writing any code, which you can also play in Undercreator. UCME files are one of several game data file types Undercreator uses. Other examples include .UCED files for encounters and .UCAT files for attacks.

How to open a UCME file

UCME files are not meant to be opened. Instead, Undercreator loads the information in the UCME file. You can find UCME files in the C:\​Users\​[user]\​Desktop\​undercreatordemo\​Maps game directory.

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Programs that open or reference UCME files

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Sil Games Undercreator

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Category: Game Files

Updated: February 2, 2026

FAQ

What is a UCME file?↓
A UCME file is a map used by Sil Games Undercreator, a tool for building Undertale‑style fangames. It contains information about a map in a proprietary binary format, which includes paths a player can navigate during gameplay.
How do I open a .ucme file?↓
UCME files are not meant to be opened. Instead, Undercreator loads the information in the UCME file. You can find UCME files in the C:\​Users\​[user]\​Desktop\​undercreatordemo\​Maps game directory.

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