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Minecraft Java 1.21 Mods

Browse 23 free mods for Minecraft Java 1.21 — popular picks include Ember's Underground Rooms, TheDungeons, Dungeons Reborn.

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Ember's Underground Rooms
1.21.1forge

Ember's Underground Rooms

New underground dungeons with varied rooms, treasure and enemies! Now with achievements!

319kdownloads
TheDungeons
1.17

TheDungeons

A custom dungeon with multiple functionality. Monsters, access levels and much more! [1.17-1.21.x]

13kdownloads
Dungeons Reborn
1.21.1fabric

Dungeons Reborn

Vanilla friendly mod that adds Minecraft Dungeons style content to the game

11kdownloads
Outer End Wilds
1.21.1neoforge

Outer End Wilds

Adds Two New End Biomes inspired by Minecraft Dungeons

6.4kdownloads
Deltapack
1.21.11

Deltapack

A deltarune datapack adding content from dark fountains and dark worlds to the roaring knight. As well as items and spells like snowgrave and the shadow mantle.

5.6kdownloads
Grave Bane
1.21.1neoforge

Grave Bane

A mod that adds cool new blocks from Minecraft Dungeons to spice up your world. This mod includes a variety of new blocks. <3

1.6kdownloads
Minecraft Dungeons Stuff
1.21.8fabric

Minecraft Dungeons Stuff

This mod brings different stuff from Minecraft Dungeons to Minecraft.

1.6kdownloads
Medieval Stuff
1.21fabric

Medieval Stuff

Just a small mod which will be expanded in future with lots of content.

1.4kdownloads
Castle Siege | King, teams, kits, abilities, arenas & more
1.20

Castle Siege | King, teams, kits, abilities, arenas & more

Seize or Shield in Castle Siege, Inspired by Mineplex

1.4kdownloads
The Underworld Mod
1.21.4neoforge

The Underworld Mod

A dungeon mod that adds a new massive dungeon made out of custom blocks + new swords with special effects.

1.1kdownloads
Mobo's Structures
1.21.4

Mobo's Structures

Pirate Ships! Castles! Dungeons! Towers and More! If you're an explorer, this datapack is for YOU!

885downloads
Toms Server Additions: Bouncy Castle!
1.21.6fabric

Toms Server Additions: Bouncy Castle!

Serverside colourful bouncy blocks!

496downloads
"Townfall" - Dungeon in the sky
1.21.5fabric

"Townfall" - Dungeon in the sky

Data pack roguelike sky dungeon

435downloads
Shadow Addons
1.21.10fabric

Shadow Addons

Adds shadow-themed blocks, tools, enchantments, dungeons, and custom challenge spawners.

229downloads
MagicStructure
1.21

MagicStructure

Add trees, dungeons, new buildings, and flying islands from schematics to your world generation.

225downloads
Hollow Knight: Silkcraft
1.21.8neoforge

Hollow Knight: Silkcraft

Welcome to Silkcraft, this mod aims to bring the kingdom of Pharloom from Silksong into minecraft!

173downloads
Improved Structures & Dungeons
1.21.10

Improved Structures & Dungeons

The combination of all minecraft Structure & Dungeons Data Pack

121downloads
Hallownest's Remains
1.21.1neoforge

Hallownest's Remains

This mod adds the remnents of the ancient civilizations of Hallownest and Pharloom from Team Cherry's Hollow Knight and Hollow Knight: SIlksong.

108downloads
CasleRush
1.21.11

CasleRush

CastleRush, inspired by the German Youtubers "Rewinside" and "Ungespielt". A Paper Plugin that you can install to play an optimized version of the Format. Build your Castles with how many friends you want and race against them at the end.

101downloads
Ravenborne
1.21.1neoforge

Ravenborne

Class based medieval fantasy rpg mod based by Ravenborne theme!

81downloads
Masterpieces
1.21.2

Masterpieces

A collection of real-world masterpieces turned into Minecraft paintings. Display iconic artworks in your castles, galleries, and mansions.

73downloads
Chunky Dungeons
1.21.11

Chunky Dungeons

A basic dungeon generating plugin for your dungeon needs.

58downloads
Integrated Cataclysm Mod (1.21.1, 1.20.1) – Cataclysm Structures Reworked
1.21.1

Integrated Cataclysm Mod (1.21.1, 1.20.1) – Cataclysm Structures Reworked

Integrated Cataclysm Mod overhauling Cataclysm structures. It transforms them into detailed dungeons while integrating features from other mods. Features: Redesign Cataclysm structures into complex, highly detailed dungeons. Integrate decorative elements from Supplementaries and Quark for immersive environments. Add Create-based mechanics, including doors, puzzles, and traps. Include recipe adjustments to better connect Cataclysm with other mods. […]