Neoforge Mods for Minecraft 1.21
Browse 27 free Neoforge mods for Minecraft 1.21 — popular picks include Zombie Extreme, Zombie Improvements, Zombie Nightmare Expansions - Undead Horror Monsters.
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Zombie Extreme
This is a Big Mod that adds a bunch of new mechanics and a large number of zombies and infected to your minecraft world. In order to study a new biome, you need a Chemical Protective Suit, if you do not break at least one part, most of the radiation will i
Zombie Improvements
Improves zombie leader and reinforcement mechanics and fixes a few bugs
Zombie Nightmare Expansions - Undead Horror Monsters
Adds various creepy undead entities with unique mechanics and intricate designs
Zombie Horsemen
Zombie Horsemen is a Minecraft datapack that introduces a new surprise event similar to the Skeleton Trap. When triggered, a zombie riding a zombie horse, equipped with an iron helmet, iron axe, and shield, will spawn to challenge players.
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.
Plants vs Zombies:Gospi Edition ( PvZ:GE )
This is my modification that adds plants and zombies in forge 47.2.0
Guard Villagers TACZ Support
allows guard villagers, zombies, and pillagers to properly wield/spawn with TACZ weapons
Zombie Take Over
Makes zombies infect everything!
Rhyme PVZ
This is an impressive PVZ module which will include most of the plants and zombies from PVZ 1 and PVZ 2, with new mechanics and gameplay.
Zombies plus plus
Turning Zombies Up to 11 since 2024
Undead Armies
A mod focused on adding cooperation between entities to accomplish a specific target, inspired by strategies in real world armies.
XxCreeperxX's Zombie Expansion
A mod that adds various types of zombies, blocks, items, dimensions, mechanics and more
Zombie Have Eyes
Zombie Have Eyes — server-side mod for NeoForge 1.21.1. Zombies chase and attack only with direct line of sight — hide behind blocks to break aggro. Sneaking grants a distance-based chance to stay unnoticed. Compatible with Zombie Awareness.
Vykket’s Zombie Mobs
Adds new zombified variants of animals, turning your world apocalyptic!
Disney Zombies
adds stuff from all four zombies movies (and some of 5)
The Zombie Apocalypse Mod
Turns your game into a zombie apocalypse game
Chicken Jockey (Earth2Java Compat)
Inspired by 'A Minecraft Movie', this mod makes baby zombies seek out nearby chickens so they can become jockeys.

Immersive Pillagers
Face pillager hordes, explore hostile camps and lost labs, battle undead illagers, and uncover the secrets of the totem.
corpseorigin
Corpse Origin is a Minecraft mod inspired by the web comic "Shen Xiong" (尸兄)/Zombie Brother, designed for Neoforge 1.21.1, introducing a core system of infection, mutation, and evolution.
Pea Garden: a Plants vs Zombies mod
Adds Plants vs Zombies plants and items to your minecraft world
Zombie Expansion
A mod that adds various types of zombies, blocks, items, dimensions, mechanics and more
Qa Zombie Enhance
A mod that simply enhances vanilla zombies.
Summoning Eggs being Created
Adds balanced crafting recipes for spawn eggs. Each egg requires a Name Tag, a Soul Stone, and mob-specific materials. 11 craftable mobs: Cow, Pig, Sheep, Chicken, Zombie, Skeleton, Spider, Creeper, Villager, Wolf, Horse.
How Rotten!
How Rotten! adds a new infection mechanic from zombie mobs to the game!
ZombieTactics-Profiled
A reworked fork of Zombie Tactics that restructures the original block-breaking system into configurable, entity-specific mining profiles, allowing different and custom NPCs to use individually adjusted parameterized behavior.
Emeralds Galore
Emerald Ores and Zombie Villagers drop more Emeralds
Another Rotten Flesh To Leather Mod (1.21.4, 1.20.1) – New Conversion Mechanism
Once you fight off hordes of zombies, skeletons and other monsters at night, you will notice rotten flesh accumulating in your inventory. Rotten flesh is arguably one of the most useless items in the game, to a point where most players just throw it away. The item can be consumed to increase health, but it […]