Mods for Minecraft Java
Browse 37 free mods for Minecraft Java — popular picks include Arthropod Phobia Expansions + Horror Bosses / Arachnophobia, Withering Heights: Revamped Wither, Brutal Nightmare : Insane Difficult.
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Arthropod Phobia Expansions + Horror Bosses / Arachnophobia
ArPhEx horror mod - realistic, intricate, phobia-inducing entities and supernatural bosses
Withering Heights: Revamped Wither
Turning the Wither into something worth calling a boss.
Brutal Nightmare : Insane Difficult
Minecraft too easy? Try this mods with nearly 40 modifiers - settings new mini bosses, which made minecraft become hard & insane. Enhanced hostile mobs' AI & Angry passive mob. Zombie place/break blocks. Skeleton,Spider,Creeper,Enderman.
The Day Of The Beast
Introduces The Devil, a new boss fight in the game.

Cursed Fate: Cursed Tweaks (New Boss Fights!)
This is an Add-On for the Minecraft mod Jujutsu Kaisen Cursed Fate Mod! This mod is solely an extension for the original mod by ImNotHURAGAN and does not work independently.
Nightmare Mode [BTW ADDON]
Nightmare Mode is an addon for Better Than Wolves CE 3.X that makes the mod a LOT harder, with focus on extreme difficulty, unforgiving mobs and reducing farming tedium. NM features new mobs, reworked mechanics and boss overhauls.
Configurable Boss Bars
A simple mod allowing for the configuration & stacking of boss healthbars

Sporeadds
Mod that adds 4 survivors origins and 1 boss origin based of an infected from the spore mod
KinglyBosses
KinglyBosses is a Minecraft plugin for managing custom bosses. It allows summoning powerful bosses, generating custom items, and enabling player spectating. It also offers features like boss lists, spawn zone management, and easy configuration reloading.
Refined Bossbars
A refined look of minecraft bossbars
Relics of Ruin
A custom weapon system featuring boss-themed swords with unique abilities and mechanics.
the hiker
the hiker, a scary mod that adds a new boss named the hiker, it also add a new biome, the hikers forest. and different variants of the hiker!
Piglin Wither
Adds a new piglin wither boss
Deepcraft
A hardcore Minecraft mod with new ore, weapons, bosses, mobs, a unique dimension, haunting music, and forgotten secrets waiting to be uncovered.
The Dulling
A Cosmic Horror Story with Bosses, Dimensions, Magic, and more!
Bossmode
Bossmode is the difficulty above hardcore that turns every mob into a boss fight, including passive mobs. Can you survive?
Dino Rumble
A very expansive and quality dino mod adding food items bosses and more!
koper_mod
A chaotic Minecraft mod with unique bosses, broken armor sets, and a corrupted dimension a little unbalanced but fun as hell.
stupid horror mod
this is a joke horror mod that adds a scary biome, where you have to kill scary creatures to collect scary souls to later craft into a boss altar and fight the boss. there is an ingot with good weapons that can take down most of the scary creatures.
Crowned Herobrine [LEGACY]
Adds a new boss called Crowned Herobrine that is a formidable opponent. He drops a useful crown ;)
NexusMobs
NexusMobs is a comprehensive RPG plugin that transforms your Minecraft server by introducing over 20 unique bosses
Cognitio
A chaotic world with strong monsters and bosses and cool artifacts with powerful abilities.
Sauling of Ascension
A wacky mod that turns minecraft into a boss and tech based progression game!
Integrity Bossfight Spawner
Makes Integrity from The Broken Script spawn on a custom day!
Yori3o's Trash 'n Brainrot
Stinking trash cans, 5G towers, a new boss - everything you needed

Chaos Structures
Every 60 seconds, a random player is chosen and a random vanilla structure spawns nearby. Players receive countdown warnings and a bossbar timer, turning every world into unpredictable chaos.
Boivindo
A gaunt bovine humanoid that doesn't hunt you, it grades you. It picks the best-fed player, always knows where you are, never runs, and cannot be killed. No boss bar, no chase music.
Nation's Roots
Nation's Roots - a mod where you choose one of 4 Races with unique Nations. Your choice grants powers and flaws. Find a Star to change your Nation and defeat a race boss to claim their legendary weapon. Your roots define your power.

Great Soup
This mod is focused on adding soups with various effects. It also adds bosses, new mechanics, biomes, and glue, but the most important thing is the soups.
BulsciCraft
Enjoy this brand new mod that adds New Dimensions, Mobs, Items, Blocks, Unusual things and even a bossfight...

randomitems-mod
Adds /randomitems, /randommobs, /randomweapon, /randomarmor, /randomtool and /randomquest commands that periodically give random items, spawn random mobs, swap your gear, or assign 5-minute random quests with a boss bar and personal sidebar.
Chariz's Mayhem
A Minecraft Mod That Aims To Add Fun Things Into Minecraft, Such As New Mobs, Bosses, Weapons, Tools, Armor etc. Created By The Maniac Himself, DarkChariz
The Rake Horror Mod (1.20.1) – Night Stalking Boss Hunter
The Rake Horror Mod adds The Rake, a dangerous night creature inspired by popular Roblox horror games. It focuses on fair but intense survival combat and nighttime hunting mechanics. Features: Basic Behavior Spawns only at night Lives in a special cave structure (its base) Leaves the cave at evening and returns at sunrise Normally stays […]
Monsters Lucky Block Mod 1.12.2 (Not Just Like Other Ones)
Monsters Lucky Block Mod 1.12.2 contains a lot of new brand and cool drops. Are you tired from old drops? Try new ones! Features: New Armours that have a lot of effects. New Bosses. New Wishing Wells. New Giant Swords. New (Un)Lucky Mobs to fight! New Titans. New Robots. New Scary Plants. Screenshots: Crafting Recipes: […]
Boss And Magic
this mod add new unique bosses and many more content to the game
Snorlax Boss
Adds Snorlax as new Endboss to minecraft