Forge Mods for Minecraft 1.21

Browse 17 free Forge mods for Minecraft 1.21 — popular picks include The Lost Castle [NeoForge/Fabric], Medieval Buildings [End Edition], Medieval Buildings - New Structures!.

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17 mods

1.21.1neoforge

The Lost Castle [NeoForge/Fabric]

A gigantic castle that once was the home of a long forgotten civilization

21Mdownloads

1.21.5neoforge

Medieval Buildings [End Edition]

New incredible medieval-style structures for the End!

18Mdownloads

1.20.2neoforge

Medieval Buildings - New Structures!

Add exciting medieval buildings with hidden enemies and treasures to the world!

17Mdownloads

1.21.1neoforge

Castle in the Sky

This mod adds new structure: Castle in the Sky in your world

8.6Mdownloads

1.21.9neoforge

Medieval Buildings [Nether Edition]

New incredible medieval-style structures for the Nether!

7.9Mdownloads

1.21.1neoforge

CastleBlocks

Alternative to chunk claiming, build castles instead!

555kdownloads

1.21.8fabric

Grim Kingdoms: Lost structures & ruins

Adds Castles - Unique vanilla mobs/ hidden items

249kdownloads

1.21fabric

Grim kingdoms: Vanilla Edition

Adds Castles : Both mod versions are vanilla, this version simply removes unique vanilla special items

176kdownloads

1.21.8neoforge

Castle Tower

Adds a new Castle Tower to Forest Biomes

36kdownloads

1.20.1forge

Lost eternity

Lost eternity is a world generation mod that adds unique surface buildings and dangerous underground dungeons with traps, enemies, and great loot.

9.2kdownloads

1.21.1neoforge

Middle Magnum Opus

An exploration and building based modpack with numerous dungeons and mystical artifacts scattered throughout the world.

2.7kdownloads

1.21.1neoforge

Odysseum

A modpack focused on making Minecraft feel as deep and adventurous as possible. This includes tech, dungeon, dimension, city building, and QoL mods.

1.6kdownloads

1.21.10neoforge

ChrabPack

A pack centered around the colony building mod Minecolonies, with some dungeon, tech, and magic mods to provide some variety.

543downloads

1.21.1fabric

TDmon Mod (1.21.1, 1.20.1) – More Custom Pokémon

TDmon Mod is an addon for Cobblemon, adding custom Pokémon to the Cobblemon mod. This mod adds 5 new Pokémon to the game. Features: Stunfisk is uncommonly found in the Swamp, while Galarian Stunfisk is in the Taiga forest. All the monkeys can be rarely found in the Jungle. Be sure to check the Castle […]

1.21fabric

Epic Dungeons: A Roguelike Journey

Awesome uniquely varied epic dungeons, from the buried Crystal Castle to the spider-infested Forgotten Sewers. Your traveller's journey begins!

776kdownloads

1.21.4neoforge

Medival Writer House

this mod adds the medieval book writer mansion

51kdownloads

1.21.4neoforge

Nebulus Knight Castle

enemies and friends in one strucure with new weapons, magic effect, food and more

19kdownloads