Mods for Minecraft Java
Browse 1,313 free mods for Minecraft Java — popular picks include Cursed Features By Flygraber, Whistle, Ruinous.
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Cursed Features By Flygraber
Mod adds cursed mobs,world,bosses,items
Whistle
Adds Josh Hutcherson as a summonable boss
Ruinous
A minecraft mod that adds a bunch of stuff, including new mobs (2 bosses), new gear and new structures.
Colossus Mod
The Colossus Mod add quite a bit of content based on adventure and progression to the final boss of the mod.
Adaptive horde
Adaptive Horde adds progression-based mob waves that scale per player gear score. Configure custom waves, drops, and pacing per dimension (Overworld/Nether/End). Supports modded mobs/weapons with JSON overrides, boss bars, and live reload.
Dyable BossBars
dye bossbars different colors
Chaos Project
This mod adds a lot of new content! New bosses, mobs, dimensions, paintings, weapons, hardmode, and new DIFFICULTY!
Rainbow Gems (UPGRADED Version)
Similar to my previous Rainbow Gems mod, but tools break sooner. Adds a rainbow stick, a new dimension, and an anniversary block. Includes the Rainbow Golem boss and weaker Rainbow Minions found in Rainbow Dungeons with valuable loot.
Dread's Bosses
Welcome to Dread's Bosses where you can fight Original Bosses and Other Games Bosses
The Final Boss
A chaos‑themed mod adding devastating bosses, powerful items, and world‑ending attacks for extreme survival.
Fictitious Mobs
this mod adds a couple of mobs, and a boss
The Echo
A terrifying Fabric horror mod featuring system glitches, fake player activities, and sanity day progression. Escape a stalking entity in nightmare dimensions and stabilize the simulation by defeating the final boss, The Echo.
Early bosses
Fight 3 bosses for starting a modpack
Darkest Garden
Adds a new boss to the Pale Garden!!!
Advancement Share
Shares kill advancements and XP from mobs/bosses with all players who dealt damage.
Star of the world
this mod will add new mobs, ores, food, bosses and totally new structures
Anthony's Bosses
This Mod Adds New Bosses!

Hyrinity (Legacy)
An overall content mod adding progression, bosses, dimensions and more!
Galaxium
This mod adds 16 new bosses and each one has its own item
the weirdest bosses ever
This an extremely weird mod which adds weird stuff and even a weird dimension you need 12 beacons to go there lol
Labyrythm
Labyrythm is a Neoforge mod for Minecraft 1.21.1 that challenges players with a procedurally generated, sound-reactive maze and a unique boss encounter.
Oscurium
This mod adds new bosses, items, tools, armour, mobs and dimensions.
MythicRewards | Boss kill reward/drop plugin with custom rule support | 1.20.5+
MythicMobs Support - Top damage rewards - 6+ reward type built-in - Create your own reward rule
Tales of the Third Age - Balrog
Adds a Balrog Boss to your Middle Earth modding experience!
nmBosses
nmBosses is a powerful and flexible boss management plugin built for modern Minecraft servers. It allows server owners to create, customize, and control bosses in every detail — all through an intuitive in-game interface.
Corrupt (Horror)
A player called xXShadowReaperXx was corrupted and turned into a corrupted boss.
Grandia Dungeons
A dark fantasy roguelike dungeon adventure with classes, bosses, cursed loot, magic, traders and procedural floors.

Prototype 0.3
currently just adds some custom armor and weapons not much. later there will be bosses, extra mobs, A third set of armor, even more weapons, maybe vehicles, and a lot more.
motball craft
3 dimensions and a goofy boss at the end
Crowned Herobrine [LEGACY]
Adds a new boss called Crowned Herobrine that is a formidable opponent. He drops a useful crown ;)
Cowzilla
This mod adds in hostile cows, giant cows, and huge cow boss as well as cow based weapons.
creeper-apocalypse
Mob Replacement System ALL mobs spawn as Creepers! with exceptions Exceptions that remain normal Blazes you still need blaze rods! Villagers or trading Ender Dragon final boss remains Iron Golem
Gritshell
Gritshell is a new mini-boss that adds some variety to the world.
xuangoudelight
A Minecraft mod centered around the Chinese streamer Xuan Dog, featuring various structures, creatures, and bosses.
Boss Update
This mod adds three new distinct bosses with custom drops and powers. (also available in multiplayer worlds.)
Thorm's Bosses
An action-packed End expansion adding 3 new dimensions, custom resource progression, and 8 legendary animated bosses with exclusive rewards.