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Celerium

Modpack

The modpack made for old, OLD devices.

Type

Modpack

Modrinth Downloads

254

Modrinth ID

cCCgmsrj

Last Updated

Jun 6, 2026

Description

Meet Celerium!

A modpack that focuses on stability and compatibility while also being very expandable.

Goal

The goal of this modpack used to be just something that is safe for beginners but also contributes to a smooth experience, but it can be more than that, it can be a base layer for more modpacks with different goals.

How is this modpack good?

Celerium contains carefully picked mods and configurations to ensure you can enjoy a smoother Minecraft experience in your computer regardless of its specifications! Every mod that is in this pack are almost guaranteed to have little to no problems in Minecraft! As I said, this modpack contains configurations that come as defaults to you and thanks to YOSBR, these changes persist through versions, which means it just works out of the box! (You can always alter the settings in case you're unsatisfied).

Some important stuff

This modpack doesn't control how often the mods that it includes update, so I'll only update a certain mod in the pack if that update comes to my attention.
I will only update the modpack to newer versions once all the mods that it includes are updated to said version.
Although the modpack supports 1.21.4-1.21.8 + 1.21.10-1.21.11, main development and testing is done on 1.21.10, the version that the modpack originally released at.
For guides and support about the modpack, refer to the Documentation.

Can I add my own mods?

Of course you can! After all, this IS Minecraft: Java Edition, as long as the mod is compatible with the version of the game you got for the modpack and is made for Fabric, you can add it without any problems. But I advise you to be careful, some mods might not work well with others if they touch the same system, always research about what you are adding before integrating it into the pack.

Is it safe?

Of course it is! It's even open-source, you can find the link to the source and the documentation on the right, pretty useful stuff, right?

Ways of contact:

Discord: @psystock
E-mail: [email protected]

Mods included:

Alternate Current by Space Walker
BetterF3 by TreyRuffy
Better Mount HUD by Lortseam (available on 1.1.0+)
Block Entity Render Distance by LoLip_p
Cloth Config API by shedaniel
Clumps by jareddlll08
Debugify by isxander
Distant Horizons (only available in 1.0, though.) by jeseibel
Dynamic FPS by LostLuma
Entity Culling by tr7zw
Fabric API and Fabric Language Kotlin by modmuss50
FastQuit by contaria
FerriteCore by malte0811
FPS - Display by Grayray75
ImmediatelyFast by RaphiMC
Krypton by astei
Lithium by jellysquid3
Mod Menu by Prospector
Moonrise by jpenilla
MoreCulling by FX
Not Enough Crashes by natanfudge (ADDED IN 1.4.0 BUT QUICKLY REMOVED IN 1.4.1 DUE TO INCOMPATIBILITES)
Sodium by CaffeineMC (available in versions 1.2.1+)
Text Placeholder API by Patbox
Shulker Box Tooltip by MisterPeModder
YetAnotherConfigLib (YACL) by isxander, the same creator of Debugify!
Your Options Shall Be Respected (YOSBR) by shedaniel (available on 1.3.0+)
If you want to know exactly what each mod does, check the documentation

Compatibility

Mod Loaders

Fabric

Game Versions

1.21.4 1.21.5 1.21.6 1.21.7 1.21.8 1.21.10 1.21.11

Similar Modpacks

Contained Mods (25)

Cloth Config API (Fabric/Forge/NeoForge)

Cloth Config API (Fabric/Forge/NeoForge)

Config Screen API for Minecraft

Mod 476,840,597
ImmediatelyFast

ImmediatelyFast

Speed up immediate mode rendering in Minecraft

Mod 248,380,874
Clumps

Clumps

Clumps XP orbs together to reduce lag

Mod 372,474,848
Entity Culling Fabric/Forge

Entity Culling Fabric/Forge

Using async path-tracing to hide Tiles/Entities that are not visible

Mod 322,100,018
Fabric API

Fabric API

Core API library for the Fabric toolchain

Mod 389,147,965
YetAnotherConfigLib

YetAnotherConfigLib

A builder-based configuration library for Minecraft.

Mod 192,731,950
Sodium

Sodium

The fastest and most compatible rendering optimization mod for Minecraft. Now available for both NeoForge and Fabric!

Mod 290,808,020
FerriteCore

FerriteCore

Memory usage optimizations

Mod 116,718,082
Lithium (Fabric/NeoForge)

Lithium (Fabric/NeoForge)

An optimization mod for Minecraft which improves server performance significantly.

Mod 182,333,703
Mod Menu

Mod Menu

Adds a mod menu to view the list of mods you have installed.

Mod 181,080,789
Fabric Language Kotlin

Fabric Language Kotlin

Fabric language module for Kotlin

Mod 162,106,486
Alternate Current

Alternate Current

An efficient and non-locational redstone dust implementation

Mod 76,077,166
BetterF3

BetterF3

A mod that provides a highly customizable, more human-readable Debug HUD.

Mod 96,843,795
Text Placeholder API

Text Placeholder API

Placeholder and Text manipulation library for your Minecraft mods.

Mod 43,556,539
Dynamic FPS

Dynamic FPS

Improve performance when Minecraft is in the background

Mod 96,523,127
MoreCulling

MoreCulling

A mod that changes how multiple types of culling are handled in order to improve performance

Mod 71,928,411
Debugify

Debugify

Fixes Minecraft bugs found on the bug tracker

Mod 60,551,456
Your Options Shall Be Respected (YOSBR)

Your Options Shall Be Respected (YOSBR)

Your options shall be respected.

Mod 50,025,150
Better Mount HUD

Better Mount HUD

Improves the ingame HUD while riding a mount

Mod 37,538,443
FastQuit

FastQuit

Lets you return to the Title Screen early while your world is still saving in the background!

Mod 26,733,695
Krypton

Krypton

A mod to optimize the Minecraft networking stack

Mod 66,580,790
Shulker Box Tooltip [Fabric/Forge/NeoForge]

Shulker Box Tooltip [Fabric/Forge/NeoForge]

What's in my shulker box?

Mod 45,813,417
FPS - Display

FPS - Display

A Fabric mod that shows your ingame FPS on screen

Mod 4,333,197
Moonrise

Moonrise

Optimisation mod for the dedicated/integrated server.

Mod 182,480
Block Entity Render Distance

Block Entity Render Distance

Limits the rendering distance of Block Entity

Mod 23,523

External Resources