Neoforge Mods for Minecraft Java
Browse 316 free Neoforge mods for Minecraft Java — popular picks include OHPS10 Boss, Bosscraft 2: Remake, PixelColonies: Arcane Journeys.
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OHPS10 Boss
Adds the boss "Obama Harry Potter Sonic 10"
Bosscraft 2: Remake
Bosscraft 2: Remake is an unofficial project inspired by Sthullen's famous mod for older and outdated versions of Minecraft. This project takes the iconic mechanics of the classic mod and integrates them into modern versions of the game.
PixelColonies: Arcane Journeys
Dimension and Exploration Modpack with very hard Bosses and other Creatures, as well as many diffrent dimensions and Quests
Ancient Aether - Boss Music Addon
Uses the Aether II mini-boss theme to play as the Mutated Aechor Plant's boss track

Dimension Update
The mod adds new bosses and op wepoins
Dragons Catalysts
Introduces a new material called Soulite. Biomes, dimensions, mobs and bosses will be added in later stages.
Glowroot Caves: Hybrid Encounter
Makes the Glowroot Hybrid boss from Glowroot Caves encounterable in survival gameplay.
ReniDrags Molten Mayhem!
Explore the new biome that brings dungeons, dimensions, a custom boss, cool new custom items and of new tools!! Get on this mod baby!! Its super duper cool (source trust me bro)
TYAZVR Spider-Man
This mod is a Spiderman mob at add new things to do Bosses to fight this and is not the best but try
Vizer
New strong bosses,weapons and much more!
Deepcraft
A hardcore Minecraft mod with new ore, weapons, bosses, mobs, a unique dimension, haunting music, and forgotten secrets waiting to be uncovered.
Boss Checklist - Mob AI Tweaks Compatibility
Integrates the Ominous Phantomare boss as well as the reworked Elder Guardian and Ravager from Mob AI Tweaks as entries in the Boss Checklist mod.

Rick's Roll
Adds rick astley as a boss and a rickroll music disk.
Temples & Templates
Adding more boss encounters and tools to spice up your minecraft playthroughs!
Peaceful Alternative
Blocks all hostile mob spawns (incl. spawners, bosses, summon command) and replaces hostile- & animal-kill-based recipes with peaceful alternatives in the future - full non-combat progression.
Boss Checklist DivineRPG Addon
Adds DivineRPG bosses to Boss Checklist.
Leveled Weapons
Explore, Fight Bosses, and find extremely powerful weapons and level them up fighting mobs!
Palamobs [ Discontinued ]
An add-on for Palamod Recreated and Custom NPC. The different mobs will finally be able to burst into your adventures with their different dungeon styles, bosses, and NPCs.
The Epic Player Boss
Adds a new player like NPC boss which will give you an epic boss fight.
Kings & Monsters
An adventure and progression mod featuring the Ogre Tribe, guarded outposts, escalating patrols, powerful relics, a massive fort, and a multi-stage boss fight.
Ivar's Bosses
Ivar's Bosses is a mod that introduces formidable bosses to the game, featuring unique attack patterns and special summoning rituals. These ancient creatures will unleash their wrath upon anyone who dares disturb their eternal slumber.
Headaches!
Headaches! is a Minecraft mod that adds new structures inhabited by the most absurd and unconventional mini-bosses—all characterized by having disproportionately large heads. Discover a challenging new adventure!
Electric Boogaloo
Adds a new zombie dancing boss, Electric Boogaloo with his iconic Backup Dancers from the Plants Versus Zombies Games
Monsters Unlimited
A challenging Minecraft mod featuring boss monsters! Starting from day ten, a powerful boss monster will appear in your world every five days.
SC Final Adventure - Machines
Hunt bosses, farm their essence through Easy Mob Farm and Create New Age, and craft your way to the End in a guided 1.21.1 factory-and-adventure pack.
Frozen Nether Roof
A frozen roof to the Nether with new biomes, structures, and a miniboss
Summonable Steve
A summonable Steve boss with complex AI and behaviors
Norious
Bored of not Having enough strong bosses to fight? Ever Wanted To become a God and fight Demons In Minecraft? This is the mod for you.
Summoner Mod
A mod that adds 4 bosses and 4 structures. Almost no dependencies!
The Angry Ghast
Three new Ghast themed bosses, one for each dimension
Daily Boss - More Config
Add more config for Daily Boss
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.
Cobblemon Boss Bars
Pokémon inspired boss bars!
Basalt Arena
This mod adds 3 new bosses and a new structure to Minecraft.
Unknown Echoes
adventure Mod centered around exploration, puzzle-solving, boss battles, and progressive ability growth.
Hardcore Horizons
A all new survival experience that will add new Bosses Biomes Blocks Dimensions Updated versions of all the current dimensions Mobs Structures Tools music And Lots More