Neoforge Mods for Minecraft Java
Browse 299 free Neoforge mods for Minecraft Java — popular picks include Slime Dimensions, Grandia Dungeons, Mewo’s Mobs and Bosses.
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Slime Dimensions
Explore the Slime World through custom portals, discover slime biomes, Liquid Slime oceans, new blocks, mobs, resources, bosses, and progression toward Arcane Slime Tech.
Grandia Dungeons
A dark fantasy roguelike dungeon adventure with classes, bosses, cursed loot, magic, traders and procedural floors.
Mewo’s Mobs and Bosses
New entities are coming with this mod!
Bosses and things
In this mod I added 3 new bosses and special items with them.
Minecraft-The CATASTROPHE mod
Adds new bosses to the base game, and overhauls the progression
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.

Hyrinity (Legacy)
An overall content mod adding progression, bosses, dimensions and more!
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.
Breeze Island
Adds a sky island with loot and a boss fight.
Boss Update
This mod adds three new distinct bosses with custom drops and powers. (also available in multiplayer worlds.)

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.
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.
bear5
A joke horror mod that adds stupid monsters, and a boss.
More Ore -
Mod that adds more content and more ore to minecraft. New content includes bosses, dimensions, weapons.
Valentine's Girlfriends
Adds new interactive npc's and bosses!
SuperRH bosses
This mod adds some uh cool stuff like a very strong boss and a total red biome
In the Journeys
The mods expand Minecraft further with new ores, mobs, biomes, dungeons, bosses, and magic to discover.
Trails of Forsaken Lands
Adventures, a lot of bosses, and crystals!
bt stipram kokam
There's another world and a boss. There are enemies. Beauty. Everything is there. There are all kinds of furnaces. There are world settings. There are tools for armor and food.
Gnomeland
Gnomes with different types such as bosses and guards and structures.
BossesChaos
Wield legendary weapons and challenge unique, powerful bosses hidden across the world. Defeat the chaos, survive deadly mechanics, and claim epic rewards!
Garfield Mod
Adds Garfield as a hungry, whining boss fight – beat him and claim your well-earned lasagna!
Chaosium
This mod is a new adventure for the player who will be able to face bigger enemy capable of killing them in a snap, this mod allows you to get new item, armor and block. Once well equipped and prepared the player can go to challenge the bosses
Villager BOSS MOD
Defeat the Crazy Villager BOSS!
The Choppa Age Update
This mod adds Choppas, Chopper Golems, Choppa Chests, and a new Choppa Golem boss to Minecraft. There are new items such as the cleavers, and a new extremely common biome called the wastelands.
Boogers & Snot
This minecraft mod gives you the ability to pick your nose, go to a new dimension, and even beat a boss!
Elder Guardian Enhanced
Experience a cinematic multi phase Elder Guardian boss fight designed to feel like an official Minecraft update

CobbleCatalyst
Adds Cobblemon trainer battle phases to Cataclysm boss fights, turning boss fights into hybrid combat and Pokemon battle challenges.
Godmode- wither rework
This mod entirely reworks the wither boss in minecraft, with custom loot, moveset, etc
EssenceBound
Adds 4 new bosses with special items and a crafting levelling system for 2 of them :)
Sapphire Tools and Armor Mod
This mod adds Sapphire Tools, Armor, and a cool new boss.
The last Soldier (TLS)
This mod adds rats, bugs, jellybears and bosses to the game
ADKM
Defeat a powerful, giant boss roaming your world to claim his legendary Scythe with +16 Attack Damage! A high-risk, high-reward challenge. (Requires GeckoLib)
Ala Loot
Random loot from the entire item registry - drop chance equals your XP level. Boss kills give legendary stacks. Multi-language, fully configurable, server-side only.