UnderMUGEN – Undertale Fighting Game

Download UnderMUGEN

Experience Undertale like never before in this fan-made MUGEN fighting game! Created by Matrillex, this unique adaptation brings 39 beloved Undertale characters into intense battles across 70 iconic stages from the original game.

Mugen Archaic Roster Screenshot

👇 Get your copy of UnderMUGEN from the link below: 👇

Requirement Specification
‍💻 Platform Windows 7/8/10/11
🔗 Processor 1.0 GHz+
📐 RAM 2GB minimum
⚙️ Storage 2GB free space
📏 Size 1.5GB+ (Download)
🎮 Controls Keyboard/Gamepad
🖥️ Graphics DirectX compatible
🌐 Internet Not required
🏳️ Language English
⚡ Style Pixel Art

How to Install UnderMUGEN

Download Files
Get the file from GameJolt link.
Extract Archive
Use WinRAR or 7-Zip to extract.
Install MUGEN
Ensure MUGEN is installed.
Configure Setup
Set up your controls and display.
Start Playing
Fill with determination!
Game Overview

About UnderMUGEN

UnderMUGEN is a fan-made fighting game that brings the world of Undertale into the MUGEN engine. Created by Matrillex, it transforms the beloved RPG into an exciting competitive fighting experience while maintaining its unique charm.
Key features include:

39 playable characters from Undertale
70 unique stages from iconic locations
Special moves inspired by original abilities
Pixel art graphics faithful to the source
Classic fighting game mechanics
Character-specific combat styles
Remixed Undertale soundtrack
Regular updates based on feedback

Unique Features of UnderMUGEN

🌟 Beloved Cast

39 fighters!

⚔️ Iconic Stages

70 locations.

⚡ Combat System

Unique moves.

🛠️ Pixel Perfect

Classic style.

Legal Considerations

Important Notice for Players

UnderMUGEN is a fan project. Please note:

  • This is an unofficial fan-made adaptation
  • All Undertale characters belong to Toby Fox
  • Distributed free of charge within the community
  • Support the official Undertale game

This project exists thanks to the passionate MUGEN community!

Tips for New Players

⏳ Practice Mode

Learn movesets!

🔧 Characters

Try everyone.

❌ Combos

Master specials.

🤝 Community

Share feedback!