Minecraft Java 1.21 Mods
Browse 56 free mods for Minecraft Java 1.21 — popular picks include Zombie Variants, ApocalypseX, The Zombie Conquest - Zombie Apocalypse (New Version).
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Zombie Variants
Add 15 variants of zombies that can appear in different biomes!
ApocalypseX
This mod adds a lot of new things! New gears. Dimensions. Bosses
The Zombie Conquest - Zombie Apocalypse (New Version)
Fight for your life in a world conquered by zombies!
Zombie Apocalypse: Last Days in the Wasteland | Survive Hordes of Zombies
Civilization is gone, the air is toxic, and the land is crumbling. Hordes of zombies roam freely, and the few structures left standing are full of danger... or salvation.
Protocol Zero - A Modern Zombie Apocalypse
Try to survive as the world gets infested slowly by a virus......
80% Abandoned Villages
Increases the abandoned/zombie village amount from vanilla's 2%, up to 80%.
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.
The Solar Apocalypse
A very light modpack, featuring a solar catastrophe!
Apocalypse Z Whispers of the Dead
A zombie apocalypse in Minecraft, where surviving every day will be an achievement
Barched
Backporting Parched, Camel Husk, Zombie Horse, Spears and more features in 1.21.11 to 1.21.1!
Afterfall - Zombie Apocalypse Survival | Inspired by DeceasedCraft
A post-apocalyptic survival modpack focused on exploration, looting, combat, and infected in a completely ruined world.
Simple Silver
Simple Silver adds a new ore tier: silver, a diamond alternative combat-wise strong against undead but iron-tier otherwise. It trades some durability for better enchantability and introduces a Hunger Resistance potion, giving rotten flesh a second wind.
ZombieApocalypse999
Zombie Apocalypse 999 is a comprehensive zombie survival plugin that introduces unique zombie mutations, an evolving threat system, player infection, custom crafting, safezones, and configurable gameplay mechanics.
Zombie Horses From Abandoned Villages
Zombie Horses spawn in the animal pens of Zombie Villages instead of normal animals They can also spawn as permanent babies or ridden by zombie villagers
[World Generator] Winter Apocalypse++
Makes the world cold and snowy in every biome in the overworld.
ZMP: Zombie Apocalypse
Survive a zombie apocalypse in ZMP with intelligent zombies, abandoned cities, realistic weapons, enhanced combat, and dynamic movement.
XxCreeperxX's Zombie Expansion
A mod that adds various types of zombies, blocks, items, dimensions, mechanics and more
Last Days Of The Middle Ages
A immersive Hardcore Medieval Zombiepocalypse
Plants vs. Minecraft
A Plants vs. Zombies mod.
Nuclear apocalypse
An expansion of minecraft oldest challenge: the 404 challenge. Where you have to stay underground to survive
Frankenstein Zombie
Expands zombies by adding a cemetery structure where a frankestein zombie can be created and leveled up. Additionally 4 new zombie types have been added
Vykket’s Zombie Mobs
Adds new zombified variants of animals, turning your world apocalyptic!
Nice Life: Eternal Winter
Make your world a winter apocalypse, snow covered Overworld + snow piling effect. Inspired by the Life series and Grian!
Zombie Apocalypse - The Bloody Night
Survival with zombies that are getting stronger every day. But has a twist there is infinity ammo for Guns (Every Gun).
ApoCraftZone - A Zombie Post-Apocalyptic Modpack
A Minecraft zombie apocalypse modpack.
Disney Zombies
adds stuff from all four zombies movies (and some of 5)
The Frozen Hell - The Last Chance
A military zombie apocalypse in a eternal winter, optimized for low-end PCs.
The Zombie Apocalypse Mod
Turns your game into a zombie apocalypse game
Quest Dimensions & Mob Hunts
A Minecraft quest datapack focused on mob hunting, dimensions, and milestone-based rewards. Progress through separate quests such as Overworld, Nether, End, Boss, Zombies, Undead, Arthropods, Animals, and Total Hostiles. Earn bonus experience
Shogun's Blast - Undead & TNT
Explore haunted Japanese villages, battle explosive Oni Warlords, and defeat the Council of Leaders in this immersive RPG structure and combat mod.

Hard Diamond Challenge
Diamond ore doesn't exist anymore, it is iron instead, you can't craft diamond gear (you'll have to find it) and there are no villages (you'll have to find and cure a zombie villager)
Why Not Create
Build and automate with Create, survive zombie hordes, enchant gear, and explore with AVA Guns and Chocolate Cows. NeoForge optimizes performance in Minecraft 1.20.1 for a smooth experience.
zzzZombie World
Makes the game only spawn zombies
SharkSquad - True Survivors
Survive against Titans in the apocalypse!

Immersive Pillagers
Face pillager hordes, explore hostile camps and lost labs, battle undead illagers, and uncover the secrets of the totem.
Disable Zombie Sieges
Disable Zombie Sieges from spawning and messing up your village in all overworld biomes.