Neoforge Mods for Minecraft Java
Browse 355 free Neoforge mods for Minecraft Java — popular picks include Document 17, Minecraft-The CATASTROPHE mod, Basalt Arena.
Step by step: How to install Minecraft Java mods & modpacks
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Document 17
Document 17 is a mod that adds in; 30+ characters (armors) two double chest's worth of items, a whole assortment of bosses to fight. and new- interesting ways to play the game. along with several base superpowers for players to use. want superheros? here.
Minecraft-The CATASTROPHE mod
Adds new bosses to the base game, and overhauls the progression
Basalt Arena
This mod adds 3 new bosses and a new structure to Minecraft.
Daily Boss x Cobblemon
DBxCobblemon is a compatibility bridge provided to integrate [DailyBoss] with [Cobblemon]
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.
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
Bosses And Mobs
Adds More Bosses To Minecraft,More Tools And Armor To Minecraft again...

Hyrinity (Legacy)
An overall content mod adding progression, bosses, dimensions and more!
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.
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.
Dungeon Descent
Dungeon Descent adds a massive five-floor underground stronghold packed with themed rooms, deadly traps, hidden loot, safe-room checkpoints, unique enemies, and five powerful bosses. Claim boss souls, awaken artifacts, and forge mighty gear.
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.
Boss Update
This mod adds three new distinct bosses with custom drops and powers. (also available in multiplayer worlds.)
More Ore -
Mod that adds more content and more ore to minecraft. New content includes bosses, dimensions, weapons.

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.
Cowzilla
This mod adds in hostile cows, giant cows, and huge cow boss as well as cow based weapons.
SuperRH bosses
This mod adds some uh cool stuff like a very strong boss and a total red biome
Crowned Herobrine [LEGACY]
Adds a new boss called Crowned Herobrine that is a formidable opponent. He drops a useful crown ;)
In the Journeys
The mods expand Minecraft further with new ores, mobs, biomes, dungeons, bosses, and magic to discover.
BossesChaos
Wield legendary weapons and challenge unique, powerful bosses hidden across the world. Defeat the chaos, survive deadly mechanics, and claim epic rewards!
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.
Elder Guardian Enhanced
Experience a cinematic multi phase Elder Guardian boss fight designed to feel like an official Minecraft update
bear5
A joke horror mod that adds stupid monsters, and a boss.
Trails of Forsaken Lands
Adventures, a lot of bosses, and crystals!
Morrowless
A dark Minecraft horror mod with disturbing creatures, unique bosses, unsettling structures, lore, and dangerous nighttime encounters.

CobbleCatalyst
Adds Cobblemon trainer battle phases to Cataclysm boss fights, turning boss fights into hybrid combat and Pokemon battle challenges.
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.
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
Garfield Mod
Adds Garfield as a hungry, whining boss fight – beat him and claim your well-earned lasagna!
THE SLOPSTROSITY
Adds THE SLOPSTROSITY boss!
Boss Checklist - Lycanites Mobs Compatibility
Integrates all rare mob variants and dungeon mini-boss categories as well as Rahovart, Asmodeus and Amalgalich from Lycanites Mobs as entries in the Boss Checklist mod.
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.
Maximus Wizard Secret Boss
An old project of mine, a really annoying boss