Oneblock Ultimate

Oneblock Ultimate

The ultimate modpack for Oneblock!

by Unknown
24.2K Downloads
0 Followers
neoforgeMC 1.21.1lightweightmultiplayeroptimization

About this Modpack

Oneblock Ultimate

A modern recreation of the classic Oneblock experience — rebuilt for NeoForge 1.21.1.

Oneblock Ultimate is a polished, stable, and flexible Oneblock modpack, recreated entirely from scratch. The original from TL Mods was never republished, so this is a fresh take — redesigned for modern systems and built to run any Oneblock map you want to play.

Getting started

  1. Install the pack with the Modrinth app
  2. On first launch, a FancyMenu prompt offers recommended Oneblock maps — pick one and you're in
  3. Later, swap in any map you like. Classic, modded, themed, or challenge-based — it all works

The pack doesn't bundle maps on purpose: we can't redistribute other people's work
without their consent, and that respect is exactly what sets us apart. Oneblock
Ultimate is the only pack built around that principle — and the in-game helper
makes setting up your map effortless instead of a chore.

What's inside

Performance & FPS

  • Sodium, Lithium, FerriteCore, Dynamic FPS, ImmediatelyFast
  • Entity Culling, More Culling, Model Gap Fix, LightSpeedRe, ScalableLux
  • Alternate Current, Clumps, LambDynamicLights, Lighty

Visuals & Shaders

  • Iris Shaders, Reese's Sodium Options, Sodium Extra, Smooth Gui
  • Entity Model Features, Entity Texture Features, Continuity

Quality of Life

  • REI, Jade, AppleSkin, Enchantment Descriptions, Better Advancements
  • Controlling, Crafting Tweaks, Mouse Tweaks, Inventorio, TrashSlot
  • Bridging Mod, Forgiving Void, NetherPortalFix, KleeSlabs, Snad
  • No Crop Trample, Better Farming, FallingTree, Ding, Tutorial Suppressor

Storage & Automation

  • Storage Drawers, Iron Barrels, Iron Furnaces, GraveStone Mod

World & Content

  • Supplementaries, Supplementaries Squared, Doggy Talents Next
  • AI Improvements, Sleep, Let Me Despawn, Almanac

Maps & Server

  • Xaero's Minimap, Xaero's World Map
  • Simple Voice Chat, LAN Server Properties, NeoAuth, No Chat Reports

Audio & Immersion

  • Sound Physics Remastered, Melody, Immersive UI, AsteorBar, Neat

Libraries (API) — Architectury, Balm, Cloth Config, YACL, Bookshelf, Moonlight Lib, Kotlin for Forge, FancyMenu, and more

Why Oneblock Ultimate?

  • A clean, modern base: built specifically for Oneblock, nothing extra, no forced worlds
  • NeoForge 1.21.1: the current ecosystem for performance, compatibility, and stability
  • Performance first: a curated stack that stays smooth even in late-game islands
  • Regularly updated: new versions keep your world alive and compatible

Support

Found a bug or have a suggestion? Send a message in the discord server. I read everything. Literally.


Looking for a server to run it on? I use NeyHost — grab 30% off your first month with code LEAF30 (their hosting is genuinely great):

NeyHost Promo Code

Available Versions

Oneblock Ultimate 1.2.0release
MC 1.21.1neoforge2.6K downloads
July 20, 2026
Oneblock Ultimate 1.1.0release
MC 1.21.1neoforge3.9K downloads
June 5, 2026
Oneblock Ultimate 1.0.2release
MC 1.21.1neoforge16.0K downloads
December 2, 2025
Oneblock Ultimate 1.0.1release
MC 1.21.1neoforge246 downloads
December 1, 2025
Oneblock Ultimate 1.0.0release
MC 1.21.1neoforge1.5K downloads
November 19, 2025

How to Set Up a Oneblock Ultimate Server

1

Order Server

Choose at least 4 GB RAM (6 GB recommended for Oneblock Ultimate). Based on player count: per 5 players.

2

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Oneblock Ultimate" and click "Install". The neoforge loader and Minecraft 1.21.1 are configured automatically.

3

Start Server & Play

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

Frequently Asked Questions

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

Most common causes: insufficient RAM or wrong neoforge loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 6 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 Oneblock Ultimate server really need?

Minimum 4 GB, recommended 6 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 €5.2/month).

Can I add custom mods to Oneblock Ultimate without conflicts?

Yes, but check compatibility: only use mods for the same loader (neoforge) and same Minecraft version (1.21.1). 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.

Oneblock Ultimate server lagging – performance tips

1) Increase RAM to 6 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.

Rent Oneblock Ultimate Server

Start your own server with automatic modpack installation.

Recommended RAM:
6 GB(min. 4 GB)
From 5.20 / month
Create Server Now
1-Click Modpack Install
NVMe SSD Storage
DDoS Protection included
Automatic Backups

Details

License
MIT License
Server-side
Required
Client-side
Required

Supported Versions

1.21.1

Start your Oneblock Ultimate Server now

From €5.20/month; 6 GB RAM is recommended for best performance.

Configure Server →