Forge Mods for Minecraft 1.20
Browse 79 free Forge mods for Minecraft 1.20 — popular picks include Qliphoth Awakening, Ender Dragon Fight Remastered, Dungeon Now Loading.
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Qliphoth Awakening
Adds various bosses with unique attacks and mechanics.
Ender Dragon Fight Remastered
A difficulty increase of Minecraft's final boss, with a focus on a somewhat Vanilla feel.
Dungeon Now Loading
Explore the vast, challenging dungeons that are loaded into your world! This mod introduces new dungeons, along with tricky, but fair bosses to fight at the end of the dungeon.
Armageddon
A highly configurable overhaul of Minecraft's way of progressing through the game : bosses, RPG-like, new mechanics, multiplayer compatibility, weapons, ores... !
alternative_twilight
Added more mechanisms to the bosses of Twilight Forest, making it more time to prepare for them
Snow's Bosses: Mechasent
This mod adds a new boss to raids — the Mechasent. It appears during the final two waves of a raid.
Aerlune RPG
Minecraft Mod - New unique weapons, mechanics, mobs, bosses, biomes
Sky Lands
Adds new sky islands biomes, blocks, bosses, weaponery and much more
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.
ROARING
Brace yourself for one of the Roaring Knight, one of the most Difficult Bosses you've ever fought in a Minecraft Mod. The Knight is fast, smart and uses Attacks that give ''Dark Damage'', which goes trough any type of Health Protection, so be warned.
Mecha Pillager Boss
Adds the Mecha Pillager Boss into the game.
The Day Of The Beast
Introduces The Devil, a new boss fight in the game.
Nature and Creatures
The mod will add many new mobs to the game, which will have unique mechanics, abilities and drops. In almost every biome you will find at least a unique mob, and you can also stumble upon new bosses.
Austinsupercar's Dungeons and Bosses
Difficult dungeons and bosses with anti-cheat mechanics.
CrazyVillagers
CrazyVillagers adds hilarious and chaotic new villagers to Minecraft! From a pooping villager to a newborn baby, a fat villager, and the powerful Mecha Boss — expect weird behaviors, dark humor, and total village madness!

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.

BossCraft Respawn : Unofficial Port
Unofficial Port of BossCraft 1.3.2

Sporeadds
Mod that adds 4 survivors origins and 1 boss origin based of an infected from the spore mod
Refined Bossbars
A refined look of minecraft bossbars
Eschatology: Bosses & Artifacts
Challenge 2 powerful new bosses, wield unique weapons, and master the Revenge Gauge mechanic. A combat expansion mod focusing on end-game content.
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!
The Dulling - A Final Challenge
Adds an eldritch threat to your world, with Bosses, Dimensions, Magic, & more!

BossCraft Respawn : Overlord
Unofficial Port of BossCraft and BossCraft2 Content
Myths & Machinery
A Create-centered RPG modpack featuring mechanical automation, skill-based combat, powerful bosses, and vast fantasy exploration.
More And Ore
More And Ore Contains an increasing amount of Content, Beginning with Ores and Items as well as Various Armors, Tools and Weapons, as well as Exponential amounts of New Features, Mobs, Bosses and Difficulty increasing Modifications!

Calamity
Calamity is an expansive overhaul project that introduces challenging new bosses, unique mechanics, and a rich layer of lore to the core experience.
GahoodRPG
Adds RPG elements to minecraft which includes classes, armor, weapons, bosses, and more.
The Dulling
A Cosmic Horror Story with Bosses, Dimensions, Magic, and more!
Aesthetic Realms (Create & Magic)
! Optimized Distant Horizons ! Create Addons & New Spells & Bosses & Farming Mechanics and MORE!
Mekanism: FuryBorn in the Artifacts
Adds some mechanical bosses for Mekanism Mod!
Epic RPG: Combat Reset: RPG/Souls Mode
Allows certain bosses to heal when a player dies. Configurable RPG or Dark Souls mode.
Project TAO
Project TAO is a modpack featuring unique mechanics, quests, items, bosses, and plenty of original content. I started this project because I couldn't find a modpack that felt right for playing with friends.
BLACKSOULS II
A hardcore dark-fantasy RPG mod with custom stats, skills, bosses, souls, weapons, accessories, and brutal combat mechanics.
BossesRise DodgeRoll Removal Fix
Removes dodge roll mechanic for Bosses'Rise mod.
Conquer & Evolve - restored
A mod that adds new content: items, creatures, bosses, weapons, structures, mechanics, and battles
Dino Rumble
A very expansive and quality dino mod adding food items bosses and more!