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]
Adds in Beta Pokémon into your Cobblemon world!
galactic create
A massive Create addon introducing oxygen mechanics, custom planets, inter-dimensional spacecraft, alien mobs, and procedural space structures.
Cobblemon / Stellaris Compatibility Patch
Allows Cobblemon's Pokemon to spawn on planets from The Stellaris Team's Stellaris mod.
Cobblemon No Man's Craft Compatibility Patch
Fixes Cobblemon not spawning and asphyxiating on alien planets
STAR WARS: Project The Force {SWPTF}
A project that will completely immerse you in a Galaxy far, far away;)
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.
Sticky Fireworks
Rockets that stick to nearby mobs and launch them into the sky!
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!
Laicaps
[Alpha] A fantasy space exploration mod - for neoforge 1.21.1
Space Update
dannytaylor's April Fools' 2025 "Update"
Stellar Depths
Drift through cosmic emptiness. A space exploration mod built around scale, silence, and the unknown.
Carpet Sky Additions Miller's Planet
Carpet extension providing a world like Miller's Planet from movie Interstellar, with new ways to obtain resources.

Stellaria
A mod dedicated to fighting enemies in a space-like environment!
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
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).
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.
Mob Rockets
Send hostile Overworld mobs on an explosive one-way firework rocket ride! For hand-held, crossbow, and elytra use.
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.
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 :]
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.
Cobblemon // Project: Spacetime
A Cobblemon side-mod that adds space-time distortions to Cobblemon, inspired by Pokemon Legends: Arceus.
TheHandOKill
Small mod adds the iconic "space erasure" sound that plays every time you kill a mob with a single hit
HealthIndicatorss
Shows health hearts, HP, armor and distance above mobs and players in world space. Toggle visibility with V key.
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
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]
Travel to a different planet? Fight new bosses? Discover new game mechanics? Welcome here.