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Minecraft Java 1.21 Mods

Browse 26 free mods for Minecraft Java 1.21 — popular picks include SpaceworldMons [Cobblemon], galactic create, Cobblemon / Stellaris Compatibility Patch.

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SpaceworldMons [Cobblemon]
1.21.1fabric

SpaceworldMons [Cobblemon]

Adds in Beta Pokémon into your Cobblemon world!

28kdownloads
galactic create
1.21.1neoforge

galactic create

A massive Create addon introducing oxygen mechanics, custom planets, inter-dimensional spacecraft, alien mobs, and procedural space structures.

12kdownloads
Cobblemon / Stellaris Compatibility Patch
1.21.1

Cobblemon / Stellaris Compatibility Patch

Allows Cobblemon's Pokemon to spawn on planets from The Stellaris Team's Stellaris mod.

5.6kdownloads
Cobblemon No Man's Craft Compatibility Patch
1.21.1

Cobblemon No Man's Craft Compatibility Patch

Fixes Cobblemon not spawning and asphyxiating on alien planets

2.5kdownloads
STAR WARS: Project The Force {SWPTF}
1.21.1fabric

STAR WARS: Project The Force {SWPTF}

A project that will completely immerse you in a Galaxy far, far away;)

984downloads
Rustling Spots: Team Rocket Addon [Cobblemon]
1.21.1neoforge

Rustling Spots: Team Rocket Addon [Cobblemon]

Adds rare Jessie and James interruptions to Rustling Spots, turning exploration encounters into scalable Team Rocket trainer battles with unique dialogue and rewards.

923downloads
Sticky Fireworks
1.21.5

Sticky Fireworks

Rockets that stick to nearby mobs and launch them into the sky!

739downloads
SpaceFrog's Hungry Hungry Frogs
1.21.5

SpaceFrog's Hungry Hungry Frogs

Frogs extra hungry & extra powerful: Frogs can eat all hostile vanilla mobs, and the elusive, immortal, insatiable ÜberFrog will one-shot kill any hostile! Build a frog army today!

646downloads
Laicaps
1.21.1neoforge

Laicaps

[Alpha] A fantasy space exploration mod - for neoforge 1.21.1

477downloads
Space Update
1.21.4fabric

Space Update

dannytaylor's April Fools' 2025 "Update"

453downloads
Stellar Depths
1.21.1neoforge

Stellar Depths

Drift through cosmic emptiness. A space exploration mod built around scale, silence, and the unknown.

400downloads
Carpet Sky Additions Miller's Planet
1.21.11fabric

Carpet Sky Additions Miller's Planet

Carpet extension providing a world like Miller's Planet from movie Interstellar, with new ways to obtain resources.

339downloads
Stellaria
1.21.1fabric

Stellaria

A mod dedicated to fighting enemies in a space-like environment!

251downloads
Aquatic Creatures
1.21.4neoforge

Aquatic Creatures

Did you know we know most about the space than own ours oceans? I want to make you feel that with this mod

242downloads
SpaceFrog's Real Pet Frogs
1.21.5

SpaceFrog's Real Pet Frogs

You can tame & make frogs your pets similar to wolves & cats. They get power-ups, they'll teleport to you on your adventures, or summon them as a mighty Frog Squad! They'll even defend you from hostile mobs (see details).

197downloads
SpaceFrog's Frog Variant Changer
1.21.5

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.

197downloads
Mob Rockets
1.21.11fabric

Mob Rockets

Send hostile Overworld mobs on an explosive one-way firework rocket ride! For hand-held, crossbow, and elytra use.

197downloads
Pixelmon: No More Ultra Space
1.21.1neoforge

Pixelmon: No More Ultra Space

No More Ultra Space [Pixelmon Sidemod] removes Ultra Space and wormholes for good, relocating every Ultra Beast into matching overworld biomes with beast chests, horde battles, and ultra terrain blocks all aquirable from the overworld.

138downloads
SpaceFrog's Pet Tadpoles
1.21.5

SpaceFrog's Pet Tadpoles

Fulfill your dream of having a pet tadpole! You can even attach leads and keep them as young tadpoles forever! Take them on a walk and bond, but make sure to follow local leash laws :]

136downloads
SpaceFrog's Cat Variant Changer
1.21.5

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.

94downloads
Cobblemon // Project: Spacetime
1.21.1neoforge

Cobblemon // Project: Spacetime

A Cobblemon side-mod that adds space-time distortions to Cobblemon, inspired by Pokemon Legends: Arceus.

67downloads
TheHandOKill
1.21.1neoforge

TheHandOKill

Small mod adds the iconic "space erasure" sound that plays every time you kill a mob with a single hit

48downloads
HealthIndicatorss
1.21.1forge

HealthIndicatorss

Shows health hearts, HP, armor and distance above mobs and players in world space. Toggle visibility with V key.

16downloads
Petrol Parts Mod (1.21.1, 1.20.1) – New Create Mod Components
1.21.1neoforge

Petrol Parts Mod (1.21.1, 1.20.1) – New Create Mod Components

Petrol Parts Mod is an add-on for the Create mod, that introduces some new block mechanisms that can be used in combination with Create machinery. The newly added mechanisms include components like Coaxial Cogwheel, Differential, Double Cardan Shaft, Planetary Gearset, etc. Of these, the Hydraulic Transmission system allows you to easily transport items between different […]

Fox's Handheld Cannon Mod (1.21.4, 1.20.1) – A Fun Mix Of Mobility And Explosion
1.21.4forge

Fox's Handheld Cannon Mod (1.21.4, 1.20.1) – A Fun Mix Of Mobility And Explosion

Fox's Handheld Cannon Mod introduces a new item that allows players to perform rocket jumps and deal explosive damage in Minecraft. Each ammo type provides a different effect: gunpowder launches you backward, TNT sends explosives flying, and fire charges launch explosive fireballs. Features: Rocket Jump Mechanic: Launch yourself into the air using gunpowder, great for […]

KingCraft [FORGE]
1.21.1neoforge

KingCraft [FORGE]

Travel to a different planet? Fight new bosses? Discover new game mechanics? Welcome here.

17kdownloads