Minecraft Java 1.21 Mods
Browse 66 free mods for Minecraft Java 1.21 — popular picks include Ultra Blood Moon, Nether Improvements, Hammer-On.
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Ultra Blood Moon
Blood Moon turns ordinary nights into survival events with stronger mob variants and unique lunar events, pushing players toward inevitable, high-stakes encounters.
Nether Improvements
Configurable, survival friendly tweaks to make the Nether more interesting on Vanilla servers!

Hammer-On
Anvils can now take damage from falling one block. Made for balancing carpet extra's renewableSand.
Mobs Drop Their Abilities
Defeat mobs and steal their powers! Unlock unique passive abilities like flight and teleportation, or use active items like the explosive Detonator. Transform your survival experience by using the monsters' own strengths against them.
Ghastling
Ghastling is a survival-friendly plugin for Paper 1.21.6+ that lets players keep Baby Happy Ghasts (Ghastlings) as permanent pets. Prevent them from growing up, improve their AI, and build a bond through snowball interactions!
Custom Hyperion
This project adds a Hyperion concept, just very different and survival friendly (not OP)...
SYSTEM SMP
System SMP is a premium Minecraft plugin designed for survival multiplayer servers. It adds unique features including small caps text formatting, tree felling mechanics, custom item displays, and an economy-based spawner mining system.
Super Hardcore
A datapack that makes hardcore actually hard. You now only have 5 hearts and you take damage from a fall taller than 2 blocks.
Tithe
A Hardcore multiplayer mod in which death is a debt. The living can pay a tribute to bring back the fallen.
Mitos Argentinos
A survival and adventure mod that brings the myths and legends of Argentine folklore to your Minecraft world. / Un mod de supervivencia y aventura que trae los mitos del folclore argentino.
Blocked In Hardcore
A challenging version of the Blocked In datapack
TheConstant
A Fabric mod that channels Don’t Starve–style hardcore survival into Minecraft: manage health, hunger, and sanity; survive seasons, temperature, darkness, and food spoilage with crock-pot cooking and recipe planning.
Survival-Friend
prevents creeper block damage and crop trampling, enables portal based farms on SMP, offers /tpa features and global totem pop messages and the ability to make the ender dragon a bit harder.
F&H survival
Dark fantasy survival mod that adds content from the game Fear and Funger
MC Unbalanced World
A great overhaul to survival progression, adds 30+ hours of content, to enjoy alone or with friends
HARD NEW
A technologically advanced game with a focus on realism! Shaders, automation, smart NPCs, hundreds of animals, and hardcore bosses. Explore this vibrant world with your friends using the built-in voice chat.
Squid Improvements
Squids and Glow Squids will give effects when you try to attack them! Survival friendly addition to vanilla worlds
Kult Craft Core Data Pack (1.21.1, 1.20.1) – Fight Custom Bosses Without a Long
Kult Craft Core Data Pack extends the Attribute Setter Mod by balancing health and damage numbers for several other mods. The pack lowers the health of specific boss-like monsters so they do not take forever to defeat in regular survival gameplay. Features: Changes the health stats for specific creatures from different mods so they fit […]
Zombie Nightmare Expansions Mod (1.21.1, 1.20.1) – Undead Horror Monsters
Zombie Nightmare Expansions Mod adds multiple high-detail undead creatures with different mechanics, combat styles, and special drops. The mod is designed for horror, zombie apocalypse, RPG, and hardcore gameplay packs. Features: Undead Mobs Disemboweler Large heavy zombie variant Targets players and cows High melee damage Drops Deathly Heart Tormented Zombie Disguises itself as a normal […]
JeremySeq's Damage Indicators Mod (1.21.1, 1.20.1) – Enhance Fights With Visual Cues
JeremySeq's Damage Indicators Mod enhances combat visibility by adding directional damage indicators, damage text, and health bars. Inspired by first-person shooter games, it helps players quickly identify the source of incoming damage and track mob health, making combat more intuitive and engaging. With customizable settings and a lightweight design, it’s perfect for survival, PvP, or […]
UVision Modpack (1.21.8, 1.20.1) – A Mix of Magic, Combat and Exploration
UVision Modpack is all about survival and adventure, featuring new weapons, magic spells, dungeons, and several new mobs increasing the difficulty of the gameplay. You can choose a special race from the Origins mod at the start to make your journey even more unique. You will face mighty dragons, explore new biomes, and level up […]
Mob Strength Mod (1.21.4, 1.20.1) – Boost Mob Power
Mob Strength Mod enhances the difficulty and challenge of mob encounters. By allowing players to adjust the health, attack power, and defense of mobs through configuration settings, it offers a customizable way to increase the intensity of survival gameplay. Features: Customize mob health, damage, and defense for a personalized challenge. Modify settings for specific mobs […]
Skulls And Spirits Mod (1.21.3, 1.21.1) – Dark Magic Brews To Power Your Adventures
Skulls And Spirits Mod blends necromancy with alcohol brewing, introducing powerful and darkly magical drinks. Each brew comes with its own potent effects, offering buffs that can improve your survival, combat, and mobility. Features: Gravekeeper's Brew Creates a tombstone at your death point to keep your items safe. Rotten Rum boosts max health, regenerates health, […]
Unforgiving
Unforgiving is a brutal hardcore survival modpack where thirst, temperature, smarter mobs, and realistic damage systems will kill you repeatedly.
Play as Ender Dragon - Dragon Survival Addon
An addon for Dragon Survival mod that allows you to play as an ender dragon with vanilla-faithful abilities that revolve around magic and end crystals.
Necro'Mapa
Um modpack criado com a intenção de se aproximar de um RPG, com variações de árvores de habilidades, habilidades passivas, foco em exploração, roguelike e muito mais. Mobs hostis perseguirão você, haverá hordas e invasões, entre muito mais!
Frostfire Dragon Dragon Survival Add on Mod (1.21.1) – Master Frostfire Dragon
Frostfire Dragon Dragon Survival Add on Mod adds a brand new magical dragon species for Dragon Survival. It lets you play as a powerful glowing creature that mixes ice and fire magic together. You get special powers that help you fight back when enemies attack you, making it a fun choice for players who like […]
Wing Kirin Dragon Survival Addon Mod (1.21.1) – Dominate the Overworld Skies
Wing Kirin Dragon Survival Addon Mod adds a new mythical species to Dragon Survival. It lets you play as a powerful Chinese beast from the Nine-Layered Heaven. The creature casts strong magic spells that deal heavy damage and bring powerful effects to your world. Features: Natural Flight: You can fly through the skies from the […]
Be Bee Queen Dragon Survival Addon Mod (1.21.1) – Transform Into a Flying Bee
Be Bee Queen Dragon Survival Addon Mod extends Dragon Survival with a brand new creature transformation. It turns your normal human character into a flying insect with magic powers. You get to command worker bees, collect nectar from flowers, and build your own hive while playing with friends. Features: Bee Magic: You restore your magic […]
Armageddon Mod (1.21.1, 1.20.1) – Adds RPG Boss Progression
Armageddon Mod completely changes how you play the game. It makes you earn your items by fighting big bosses. You cannot just dig down to find diamonds right away. The mod adds a step-by-step path where you must defeat monsters to get better gear. It turns your normal survival world into a fun RPG game. […]