Minecraft Java 1.21 Mods
Browse 151 free mods for Minecraft Java 1.21 — popular picks include Craft Colonies, MedivalWariaty, Ashenfall.
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Craft Colonies
Build your own medieval colony, automate factories with Create, face epic bosses, and explore a vast world full of unique biomes, structures, and adventures.
MedivalWariaty
rpg playstyle with races and bosses
Ashenfall
Turning Minecraft into a crazy RPG, where you can upgrade with skills, conquer dungeons, slay bosses and so much more
Pixeltheris
Epic RPG Modpack 1.21 – explore dungeons, master magic, face challenging bosses, build and decorate, and enjoy enhanced combat, progression, and quality-of-life features. Optimized for multiplayer and private servers.
Mine RPG
This is combination of mods to add more content to Minecraft including bosses, biomes, creatures. This is more RPG adventure style while keeping all vanilla. No extra metals or materials are added on this pack.
AntiLogout
A lightweight anti-combat-log plugin for 1.21.x. Features a 20-second BossBar countdown and automatic death penalty for players who logout during combat.
Grandia Dungeons [Modpack]
A dark fantasy dungeon roguelike modpack with bosses, classes, cursed loot, magic, custom UI and atmospheric progression.

idleProgress
🛡️ Level up stats, master RPG classes, and explore a world full of quests! 🌲 Realistic landscapes and new bosses.
NeoAdventure
Just a modpack for quick play with buddies, lots of different bosses, multiplayer loot system, less focus on item storage or structure building, more focus on magic and item upgrading...
Robot Legion
Build a steampunk robot army. Workers automate jobs while combatants fight beside you through three boss dungeons. Trade with engineer villagers for rare parts.
Warhaven
Warhaven is an adventure-packed guild modpack for Minecraft! Explore new biomes, conquer dungeons, battle bosses, and build your guild to dominate the world. ⚔️🔥
Fortune Craft Modpack
The Official Modpack for the FortuneCraft Modded Server. Explore Minecraft in a new light with a heavy focus on Create, with the addition of new Biomes, Blocks, Mobs and Bosses!
Bros Cooked
Fun vanilla like modpack, adds bosses, ores, and MANY MANY enchants (also you can become nearly unstoppable)
Bosstimized
A performance-focused modpack designed for low-end and mid-range PCs, improving FPS, reducing lag, and enhancing overall gameplay stability.
Worlds O' Plenty II
A new & updated curated modpack featuring all sorts of experiences!: - Adventure! - Decorations! - Bosses and Mobs a plenty! And of course... *drum rolls* Plenty of Worlds to explore! - Updated to 1.21.1 Neoforge!
Adimenssion
All dimenssions in one, explore worlds, defeat bosses, improve your skills. Adimenssions is a modpack for simple and fun gameplay. Available in 1.21.1!
The Mewoster
A cool battle fight in an arena between you... and The Mewoster - a Mysticat Boss made in 3 days :D
Icy's Vanilla 2
Modpack focused on enhancing all aspects of vanilla Minecraft with a focus on exploring structures and boss fights.
dungeoncraft-r
DungeonCraft is a modpack that brings the Minecraft Dungeons experience into Minecraft with new camera, dungeons, animations, and bosses.
WildFrontierr
WildFrontier is a wilderness survival & RPG adventure modpack for Fabric 1.21.1. Explore stunning terrain, battle bosses, level up your skills, and thrive in a dangerous world solo or with friends.
Rubens Better Survival
Overhauls Minecraft to a better Game! This Modpack overhauls the Visuals, improves Gameplay and adds new Structures and bosses!

CobbleCatalyst
Adds Cobblemon trainer battle phases to Cataclysm boss fights, turning boss fights into hybrid combat and Pokemon battle challenges.
Pepegwoh 2 Now In Colors
Jump into a world filled with things to explore and magic to uncover. Can you defeat the bosses?
The last Soldier (TLS)
This mod adds rats, bugs, jellybears and bosses to the game
ProjectOverhaul
Overhauls Minecraft in different ways like adding new bosses, weapons, QOL Features, Structures, etc.
UniversalX CB
A power focused modpack packed with QOL features, bosses, and armor and weapons to battle them. While also maintaining 100+ FPS (new version coming soon)
Rocks & Monsters
A modpack which aims to weave boss fights with pokémon battles seamlessly. Features revamped nether and end progression!
Esoteric
Animations, Visual Effects, Terrian Enhancements + Structures. This pack also includes rebalancing of bosses. which makes some mobs + bosses more difficult
Accurate Craft
A performance-focused Minecraft modpack featuring enhanced visuals, quality-of-life improvements, new structures, epic boss fights, and expanded building possibilities.
MOAR Tools
MOAR Tools is a progression and combat expansion mod that adds three new gear tiers, two dungeon systems, a full boss encounter, and a suite of custom mobs all designed around a dark, End-themed aesthetic.
Antique Odyssey
A progression-focused adventure modpack where ancient magic, powerful relics and mechanical engineering shape your journey. Explore a world filled with dangerous bosses, forgotten ruins, powerful spells and intricate machinery.
AETO's
A modpack focused on exploration and automation using Create: Aeronautics, also featuring magic and many bosses!
Jeff: The Awoken Core
Face Jeff, a late-game raid boss who tests your skill, strategy, and timing to earn powerful loot and master Minecraft combat
Cake Tower HUD Plus
HUD overhaul and optional server-side combat stats for the Cake Team Towers · Chapter 3 map—health, hearts, resources, team/mob 3D bars, stats panel, boss-bar toggles; v6+ damage attribution, K/A/D taken, DPS, session history. Auto-hides elsewhere.
BossesEpic — Automated Boss Events with Real HP, 13 Languages, Abilities, Vault Rewards & GUI Editor
Automated epic boss events: real HP, 13 languages, phased combat, 20+ abilities, Vault payouts +
Trick Quiver
An archery combat mod: switch between 12 magic arrows, craft bow attachments, battle clockwork archers, and raid a Japanese-style boss shrine. One arrow solves everything.