Undertale

Name: Undertale
Price: 7.800000000000001 EUR
Author: Clouser

Minecraft Full Undertale map Experience (Part 1-2)

by Clouser

154.0K Downloads

0 Followers

fabricMC 1.21adventurechallengingcombat

Rent Undertale Server View on Modrinth

Screenshots

About this Modpack

This is a fully functional Minecraft recreation of Undertale!
(Part 1-2 of 6)

Undertale Logo

This beta contains the RUINS & SNOWDIN.

Including:

18 Enemy Types
5 Boss Fights
17 Different Encounter Types
8 Routes
All Items
Full Story
All Easter Eggs
Customizable Soul Color
Voice Acting
Custom Skin Support
Custom Models, Builds, & Animations
And so much more!

Credits:

Main Team:

Specil Thanks

Play Testers:

NoteBlockMatt
MangoJuice
AWMLGaming
oChocolate
SnaveSutit
SamGladiator
Sebushtin Bush
Lolgan
Ktsnii
Tem4ik
AshIsReal
AnimalMace
Tito_Lootlabs
IamMaker
Seagoleri
CookieBunsquat
Powpow
Knarfy
Mayor05
iCats

Go Watch the Video!
Chibi Player Model sans walk

Available Versions

Undertale 0.0.5release

MC 1.21fabric151.6K downloads

May 23, 2025

How to Set Up a Undertale Server

Order Server

Choose at least 6 GB RAM (8 GB recommended for Undertale). Based on player count: per 5 players.

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Undertale" and click "Install". The fabric loader and Minecraft 1.21 are configured automatically.

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

Undertale server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 8 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a Undertale server really need?

Minimum 6 GB, recommended 8 GB for stable performance. per 5 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €7.800000000000001/month).

Can I add custom mods to Undertale without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

Undertale server lagging – performance tips

1) Increase RAM to 8 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.