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Forge Mods for Minecraft 1.21

Browse 26 free Forge mods for Minecraft 1.21 — popular picks include Withering Heights: Revamped Wither, Zombie Nightmare Expansions - Undead Horror Monsters, CRYPTID.

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Withering Heights: Revamped Wither
1.21fabric

Withering Heights: Revamped Wither

Turning the Wither into something worth calling a boss.

650kdownloads
Zombie Nightmare Expansions - Undead Horror Monsters
1.21.1neoforge

Zombie Nightmare Expansions - Undead Horror Monsters

Adds various creepy undead entities with unique mechanics and intricate designs

470kdownloads
CRYPTID
1.21fabric

CRYPTID

Unique horror mod where your world comes alive. Adds 30 new cryptids and 40 new events. Now updated for slower gameplay

144kdownloads
Zombie Horsemen
1.14.4fabric

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.

134kdownloads
oSzoukaua's: Realistic Spiders
1.21.11fabric

oSzoukaua's: Realistic Spiders

This pack makes spiders more realistic! and much cuter!

110kdownloads
Brutal Nightmare : Insane Difficult
1.16fabric

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.

84kdownloads
Too Much XP (TME)
1.21.5fabric

Too Much XP (TME)

Yeets the laggy XP orbs, whilst still maintaining a high level count

77kdownloads
Wind Boost Enchantment
1.21.11fabric

Wind Boost Enchantment

Allows one to Enchant the Harness with a Custom Enchant to make Happy Ghasts Faster

66kdownloads
Bucketable
1.21fabric

Bucketable

Put any mob into a bucket! Completely customizable!

56kdownloads
Injured Effects
1.21fabric

Injured Effects

This mod adds effects to being low on HP! This applies to players, aswell as humanoid entities like villagers, illagers, and piglins!

47kdownloads
Piglin Conservatory v3.0
1.21.11fabric

Piglin Conservatory v3.0

Adds a news structure to the Nether, The Piglin Conservatory, along with a new Obsidian Apple, Dragon Fruit, Toxic Mushrooms, Hoglins' Fossils, Corrupted Emerald and a New Music Discs!

45kdownloads
Sanity: Renewed
1.21.1neoforge

Sanity: Renewed

Brings the sanity mechanic from Don't Starve into Minecraft

21kdownloads
Corner Entity
1.21.1forge

Corner Entity

is an atmospheric horror mod that turns your peaceful Minecraft survival into a nerve-wracking experience. You will never feel truly safe again, as something is watching you from the shadows, waiting for the perfect moment to strike.

18kdownloads
Mebahel's Skeleton Revival
1.21.1fabric

Mebahel's Skeleton Revival

When death is no longer the end… their skulls flee to rise again. Summon, hunt, or suffer — in Mebahel’s Skeleton Revival, every skeleton gets a second chance.

15kdownloads
JerkSteve
1.21forge

JerkSteve

Adds the most annoying mob to Minecraft, as seen in the viral meme videos.

5.7kdownloads
Cave Dweller Overhaul
1.21forge

Cave Dweller Overhaul

Overhauls the Cave Dweller with improved AI, features adapted from the original and Bedrock versions, plus some new additions

980downloads
Simple Gravity Changer
1.21.6fabric

Simple Gravity Changer

This datapack adds a function to change the gravity of the world.

661downloads
Colly SMP [NO LONGER UPDATING]
1.21fabric

Colly SMP [NO LONGER UPDATING]

The Official Datapack used in the Colly SMP, no changes, no tweaks, THE REAL DEAL!

474downloads
Succession
1.21.11forge

Succession

What if the world remembered what you did to it?

442downloads
Better Entity Control
1.21.11forge

Better Entity Control

Take full control over mob and projectile attributes — modify health, damage, speed, armor, knockback, scale for mobs, and damage, speed, gravity, knockback for projectiles, with commands in Russian and English.

421downloads
Chaos Chickens
1.21forge

Chaos Chickens

Unpredictable Chaos Chickens ready to ruin your day.

279downloads
Garfeldi [Cobblemon]
1.21.1fabric

Garfeldi [Cobblemon]

Back in 2024, I made an April Fools' addon for Cobblemon just called "Garfeldi", ironically posted to the Cobblemon server on April 2nd. I found the files, like, 10 minutes ago, made minimal changes, and decided to post it to Modrinth.

177downloads
More Realism (MR)
1.21fabric

More Realism (MR)

This project helps you experience your world more realistically.

129downloads
You Can't Sleep
1.20.1forge

You Can't Sleep

A about bed sleep's horror mod

75downloads
Slimes Everywhere
1.19fabric

Slimes Everywhere

Allows Slimes to spawn at night in any biome

54downloads
Zombie Nightmare Expansions Mod (1.21.1, 1.20.1) – Undead Horror Monsters
1.21.1forge

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 […]