Minecraft Java 1.21 Mods
Browse 154 free mods for Minecraft Java 1.21 — popular picks include SpaceFrog's Frog Variant Changer, Better Reimagined, xApocalypse.
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SpaceFrog's Frog Variant Changer
Change a frog's variant type using a vanilla/survival-friendly method. Works with vanilla (cold, temperate, warm) and optionally 'More Frogs 2' variants: crimson, ender, infernal, poison dart, purpur, sculk, spirit, warped, and wood.
Better Reimagined
Enjoy this survival experience in an epic and immersive adventure. It introduces new mechanics that enrich gameplay with dynamic combat, while vibrant new biomes and impressive structures encourage exploration with unique and challenging mobs
xApocalypse
A brutal, customizable zombie apocalypse plugin for survival servers
Evergrowth
This mod overhauls and extends existing Minecraft features, improving core systems and mechanics to create a more advanced and engaging survival experience.
Wound & Bleeding
Wound & Bleeding adds a realistic injury system where players and mobs can bleed from combat, losing health over time unless treated with craftable bandages. It enhances tactical gameplay in PvP and survival by making every hit potentially deadly.
Mobs Drop Their Abilities
Defeat mobs and steal their powers! Unlock unique passive abilities like flight and teleportation, or use active items like the explosive Detonator. Transform your survival experience by using the monsters' own strengths against them.
Compostable
Survival friendly plugin that makes more things usable for the composter block, like rotten flesh and fish!
Skylife
A Skyblock with the goal to make everything different (at least a bit)
Blocks spawn mobs
This plugin turns harmless digging into hardcore survival – for every broken block, the world responds with a fierce invasion of hostile creatures. Are you ready for endless waves of darkness, or will you fall under the onslaught of monsters?
Custom Hyperion
This project adds a Hyperion concept, just very different and survival friendly (not OP)...
Breached (Standalone)
Breached is a competitive Minecraft survival mod inspired by Rust, built for players who enjoy looting, PvP, raiding, and base-building. It keeps much of Minecraft’s core survival identity, but adds unique systems that force raiding/basing/PVP.
Ghastling
Ghastling is a survival-friendly plugin for Paper 1.21.6+ that lets players keep Baby Happy Ghasts (Ghastlings) as permanent pets. Prevent them from growing up, improve their AI, and build a bond through snowball interactions!
Trade Less
This data pack stops all villagers from selling emeralds Perfect for servers with a tight economy or a more challenging survival experience
More Actions: squid tentacles
This mod adds something that was sorely missing in vanilla survival: tentacles that drop from squids. Now, instead of useless ink sacs, you can get useful and nutritious food. Squids are no longer such a useless mob!
Enhanced Spawners: Chambers of Control
Enhanced Spawners: Chambers of Control lets players upgrade and customize mob spawners using survival items, with full redstone control and spawn egg integration — all without commands or GUIs. Designed for clean, technical mob farms and dungeon systems.
Tithe
A Hardcore multiplayer mod in which death is a debt. The living can pay a tribute to bring back the fallen.
Super Hardcore
A datapack that makes hardcore actually hard. You now only have 5 hearts and you take damage from a fall taller than 2 blocks.
SYSTEM SMP
System SMP is a premium Minecraft plugin designed for survival multiplayer servers. It adds unique features including small caps text formatting, tree felling mechanics, custom item displays, and an economy-based spawner mining system.
Player Detector
Redstone block that detects if a player is standing on it
Blocked In Hardcore
A challenging version of the Blocked In datapack
BloodyPunch
Bare-fisted survival brutality — punch hard blocks or mobs and you bleed. Hard materials require the right tool, or nothing at all.
![[DISCONTINUED] Travis Takeover](https://pub-2ae937f770284535a96c3330f91236aa.r2.dev/thumb/modrinth/296451.webp)
[DISCONTINUED] Travis Takeover
Its corruption messes with your survival.
Time Hunter
Time Hunter is a team PvP survival datapack where players compete by mining resources and eliminating foes to extend their countdown, with elimination on timeout, supporting 2-4 team battles and strategic combat.
GrimTactics
⚠️ Hardcore-only plugin. On non-hardcore servers, GrimTactics runs in passive mode and does not modify gameplay
Renewable Survival
Makes All Items Renewable. Adds crafting or mob drops.
TheConstant
A Fabric mod that channels Don’t Starve–style hardcore survival into Minecraft: manage health, hunger, and sanity; survive seasons, temperature, darkness, and food spoilage with crock-pot cooking and recipe planning.
SuperHardcore
A mod that enhances the survival experience by limiting your health and adds many more challenges.
SpaceFrog's Cat Variant Changer
Change a cat's breed (variant type) using a vanilla/survival-friendly method. Choose from all kitty varieties: black, calico, jellie, orange (red), persian, ragdoll, shorthair, siamese, tabby, tuxedo, white & a special random type.
Survival-Friend
prevents creeper block damage and crop trampling, enables portal based farms on SMP, offers /tpa features and global totem pop messages and the ability to make the ender dragon a bit harder.
F&H survival
Dark fantasy survival mod that adds content from the game Fear and Funger
PermaEfe
PermaEfe is a Minecraft datapack that increases the difficulty progressively for 30 days, with mechanics such as permanent death, boosted mobs and unique craftables. Ideal to play with friends and test your survival.
Simple Skyblock
A datapack that adds a lot of unobtainable items to the skyblock experience.
Petrova Wastelands
Petrova Wastelands: An Interstellar Odyssey In a universe where the stars are fading, heat is no longer a resource—it is your only hope for survival.
Silk Harvest
Add the ability to get spawn eggs in survival from killing mobs using a silk touch tool.
Survival Spawn Eggs
This project adds Spawn Eggs to Minecraft Survival Mode!
PollutedLands
PollutedLands adds a dynamic pollution system where over-mining and exploitation in a chunk leads to environmental decay, corrupted mobs, and eerie visual effects, creating a harsher, more immersive survival experience.