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Forge Mods for Minecraft 1.21

Browse 16 free Forge mods for Minecraft 1.21 — popular picks include Survival island, Reliable Replacer, Hydrological (Overworld Terrain & Biomes).

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Survival island
1.21.1fabric

Survival island

Try to survive in a world made up of islands!

1.8Mdownloads
Reliable Replacer
1.21.1neoforge

Reliable Replacer

A lightweight utility for replacing one block with another, both during worldgen and afterward.

611kdownloads
Hydrological (Overworld Terrain & Biomes)
1.20.2forge

Hydrological (Overworld Terrain & Biomes)

Overworld biome and terrain fantasy-style worldgen mod.

71kdownloads
Monumental Experience - Creatures Across the World
1.20.1forge

Monumental Experience - Creatures Across the World

Monumental Experience V: Creatures Across the World expands the series with Cobblemon and Aether integration, living biomes, and exploration-driven progression—creating a survival world focused on discovery and long-term building.

20kdownloads
Pumpkin Survival House
1.21.8neoforge

Pumpkin Survival House

Adds a Pumpkin Survival House, a small and cozy starter home built inside a giant pumpkin.

14kdownloads
Over the Sky | Floating Islands, Mobs and Many Secrets!
1.21.1neoforge

Over the Sky | Floating Islands, Mobs and Many Secrets!

Survive in a world made up entirely of floating islands! Discover all the secrets, mobs, and hidden biomes.

6.0kdownloads
Void One Block
1.21neoforge

Void One Block

A world type that turns Minecraft into a true void survival experience — while keeping progression, structures, biomes, and mod compatibility intact.

5.8kdownloads
Pixelmon Wild Realms
1.21.1neoforge

Pixelmon Wild Realms

Explore a vibrant world of wild biomes, magical ruins, and epic adventures. Catch, train, and battle in a beautifully enhanced Pixelmon survival experience full of exploration and discovery.

5.0kdownloads
StarSky Shaders
1.21.4fabric

StarSky Shaders

A shader pack with fast shaders, new structures, new biomes, and way more!!!

4.2kdownloads
Isekai DX
1.20.1forge

Isekai DX

A magic survival RPG modpack inspired by isekai anime. Explore new biomes, dimensions, and face survival challenges.

930downloads
EBFsmp
1.19.2forge

EBFsmp

The mod includes new biomes, decorations, tools and armor.

907downloads
A Crazy Adventure: Science & Survival
1.21.1neoforge

A Crazy Adventure: Science & Survival

A blocky landscape with forests, mountains, a backpacked character facing a machine, and a purple Nether portal under bold white title text.

716downloads
RealmsQuest
1.20.1forge

RealmsQuest

RealmQuest - Fabric, designed for players who love epic adventures with original dungeons, bosses, and spells. It features expanded biomes, new tools.

427downloads
SurvivalReborn
1.21forge

SurvivalReborn

Survival Reborn enhances Minecraft survival with dynamic terrain, new biomes, and unique mobs, offering fresh challenges and gameplay mechanics. Explore, craft, and survive in a world full of adventure, ancient secrets, and powerful items!

408downloads
The Afterdark Mod (1.21.5, 1.20.1) – Gather Exclusive Resources And Face Challenges
1.21.5forge

The Afterdark Mod (1.21.5, 1.20.1) – Gather Exclusive Resources And Face Challenges

The Afterdark Mod introduces a challenging, resource-rich dimension that stretches 384 blocks tall and is shrouded in darkness. This hardcore dimension is filled with unique biomes, treacherous dungeons, and abundant resources. Features: Adds a 384-block tall dark dimension filled with exclusive resources Unique biomes and dungeons that reward exploration Complex world generation adds challenge and […]

Ark
1.21.1neoforge

Ark

An ARK-inspired survival modpack for Minecraft. Explore a dangerous world full of dinosaurs, prehistoric creatures, fossils, technology, and adventure inspired by ARK: Survival Evolved. Survive, evolve, and conquer nature.

6.9kdownloads