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Forge Mods for Minecraft 1.21

Browse 35 free Forge mods for Minecraft 1.21 — popular picks include Survival island, Reliable Replacer, Biome Blends.

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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
Biome Blends
1.20.1fabric

Biome Blends

Change biomes in survival using Biome Blends! Full Data Pack support!

425kdownloads
Mushroom Survival House
1.21.8neoforge

Mushroom Survival House

Adds a simple Mushroom house, perfect for the start off the game

82kdownloads
TimberReplant(Fabric/Forge/NeoForge)
1.21.9neoforge

TimberReplant(Fabric/Forge/NeoForge)

Automatically fell entire trees and replant saplings with one block break! Sustainable forestry made easy with configurable settings and proper tool durability.

82kdownloads
Hydrological (Overworld Terrain & Biomes)
1.20.2forge

Hydrological (Overworld Terrain & Biomes)

Overworld biome and terrain fantasy-style worldgen mod.

71kdownloads
Taiga Survival House
1.21.8fabric

Taiga Survival House

Adds a simple Taiga House, perfect for the start of the game

53kdownloads
Forest Survival Treehouse
1.21.11neoforge

Forest Survival Treehouse

Adds a small forest treehouse, ideal for early game survival

25kdownloads
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
Realism Mod Reborn
1.21.11forge

Realism Mod Reborn

A Vanilla+ survival expansion featuring crops, food production, gemstones, and immersive resources.

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
Sky Void SkyBlock
1.21.8fabric

Sky Void SkyBlock

Classic SkyBlock with infinite void generation. The biome map and structure bounding boxes match up with a normal world with the same seed!

14kdownloads
Bamboo Jungle Survival House
1.21.11neoforge

Bamboo Jungle Survival House

Adds a small bamboo jungle house, ideal for early game survival

7.6kdownloads
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
Vaseria Travelnes
1.21.11neoforge

Vaseria Travelnes

One of the best survival and fun mods with new ores and features!

2.8kdownloads
[ASW] Adaptive Skin Weathering
1.21.1fabric

[ASW] Adaptive Skin Weathering

Adaptive Skin Weathering a client-server visual mod for RP/hardcore/Vanilla+ servers. It dynamically applies dirt, sand, stone dust, snow, and blood to player skins based on movement, surface, damage, and biome

2.7kdownloads
Genetically Modified Monsters
1.21.8fabric

Genetically Modified Monsters

Adds genetically enhanced monsters with new powers, behaviors, and challenges to make survival more intense.

1.4kdownloads
Flat Biomes
1.21.8neoforge

Flat Biomes

Adds biomes to vanilla flat world type

1.4kdownloads
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
sky-islands
1.20.1forge

sky-islands

Sky Islands is a skyblock survival mod that transforms the entire Minecraft world into a realm of floating islands suspended above the void.

693downloads
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
Legendary Survival Overhaul Mod (1.21.1, 1.20.1) – Temperature, Thirst, Health Overhaul
1.21.1forge

Legendary Survival Overhaul Mod (1.21.1, 1.20.1) – Temperature, Thirst, Health Overhaul

Legendary Survival Overhaul Mod is a highly configurable mod that significantly expands Minecraft’s survival mechanics. It introduces new systems such as temperature, thirst, localized body damage, and a redesigned health system to create a more immersive and challenging survival experience. Features: Temperature System A dynamic body temperature system influenced by environment factors such as biomes, […]

Desert Survival House Mod (1.21.11, 1.20.1) – Start Safe In The Desert
1.21.11forge

Desert Survival House Mod (1.21.11, 1.20.1) – Start Safe In The Desert

Desert Survival House Mod adds a small desert stone house structure that players can discover. The house is strategically located in desert biomes, offering both a safe haven and a place for trading with villagers. Features: Adds a desert stone house structure in desert biomes Provides shelter for new players to stay safe from mobs […]

Just Enough Guns Mod (1.21.11, 1.20.1) – An Expanding Arsenal
1.21.11forge

Just Enough Guns Mod (1.21.11, 1.20.1) – An Expanding Arsenal

Just Enough Guns Mod is a survival-focused Minecraft mod that adds firearms in a balanced, vanilla-friendly way. Players must explore different biomes to gather rare resources and craft guns through dedicated workbenches, with stronger weapons requiring more valuable materials. Guns and attachments have durability and can jam as they wear down, encouraging maintenance or the […]

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 […]

ARKANE DOMAINS Mod (1.21.1, 1.20.1) – Explore Supernatural Boss
1.21.1forge

ARKANE DOMAINS Mod (1.21.1, 1.20.1) – Explore Supernatural Boss

ARKANE DOMAINS Mod is an adventure-survival mod that introduces the idea that each biome has its own “domain”, ruled by a powerful entity called Arkane. The mod makes the Minecraft world feel like a map of many supernatural realms, each with its own boss and unique loot. Features: The mod adds powerful Arkane entities that […]

Project: Vibrant Journeys Mod (1.21.4, 1.20.1) – A Whole New Land
1.21.4forge

Project: Vibrant Journeys Mod (1.21.4, 1.20.1) – A Whole New Land

Project: Vibrant Journeys Mod aims to add some spice to survival without changing its core aspects. Instead of adding tons of new content in one direction, this mod focuses on adding content that overlays the current style of survival. Here, you will not find complex machinery, or magical spells, or a billion biomes, or too […]

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
Thermal Tweaks – Dynamic Temperature Survival
1.21forge

Thermal Tweaks – Dynamic Temperature Survival

Thermal Tweaks introduces a lightweight but meaningful temperature system to Minecraft survival. Your body temperature ranges from −20 °C to 50 °C and reacts to biome climate, weather, wetness, sunlight, shade, armor, consumables,...

3.7kdownloads