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MC Calamity

MC Calamity

by Unknown • Downloads: 0 • Followers: 0
Description
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This ambitious datapack attempts to recreate the entire Terraria: Calamity Mod in Minecraft.

Currently adds:

  • 4 New Bosses
  • 600+ Items
  • 40+ New Mobs
  • 5 New Structures
  • 8 New Armor Sets
  • New Weapon Classes! (Magic, Ranger, Rogue, Summoner)
  • 70 New Weapons
  • Custom Accessory System!
  • New Potion Effects
  • New Music Discs
  • New Paintings
  • Reworked Fishing System
Installation FAQ

Installation

Q: How do I install the datapack?

Method 1: On world creation go to the third tab "more" and than click "data packs" then "open folder". put datapack in there.

Method 2: If your world is already created, go to the .minecraft/save/YOUR WORLD/datapacks and put folder in here

Installing the mod.jar (mod packaged version of the datapack): put in mods folder in forge/fabric/quilt. Then when you open minecraft, go to "Resource Packs" and move the "mod_resources" pack above the "default" pack otherwise Minecraft won't render the new textures.

You can check if the datapack was installed correctly by checking if you have new advancements relating to the datapack.

Q: All the items and mobs are potions/prismarine_crystals/warped_fungus_on_a_stick/clocks. How do i fix?

If Datapack: install the required Resource Pack (RP)

If Mod: go to "Resource Packs" and move the "mod_resources" pack above the "default" pack otherwise Minecraft won't render the new textures.

Q: Why are the Music and Biome Resources separate pages?

Its both for modpack developers and for ease of searching. It was argueably more confusing when it was in the main downloads.

Q: Is the datapack compatable with Optifine or Sodium?

No. The datapack occassionally uses a shader called OBJMC to render models which gets broken by Optifine & Sodium because of how they change rendering.

Q: Does this work on X version?

1.21.6 -- No, ... we are probably working on it

1.21.5 -- No, ... may be skipped for 1.21.6

1.21.4 -- Yes, for version 0.2.3

1.21.2 -- 1.21.3 - Yes, for version 0.2.2 - 0.2.3

1.21 -- 1.21.1 - Yes, for versions 0.2.0 & 0.2.1

1.20.5 -- 1.20.6 - No (Skipped)

1.20.2 -- 1.20.4 - For version 0.1.0 (DEMO)

1.20.1 and below - No, Nope. Can't back port either. the datapack heavily uses the "macro" feature of functions which was introduced in 1.20.2.

Q: Why is this a datapack and not a mod?

Roger_Swifer_Cleaner: [image: shrek, covered in mud, says "Good question."]

NotGleam: "we like working around limitations"

Gameplay FAQ

Gameplay

Q: I don't want to play, I just want to mess around in creative. Any tools?

Yes! If you load up a world in creative (or do /reload when in creative) you'll see in chat "Veiw development debug menu? [click]". Press [click] and the datapack will give you some debug options including commands, some testing items, and a fully fuctional creative menu!

As of the new update, the chat menu appears every time you enter creative because people don't read this.

Q: How do I make a workbench?

Throw a stripped log onto a crafting table

Q: How do I use the custom crafting stations?

Use the right arrow to scroll right, left arrow to scroll left.

Shift Use to craft.

Shift Punch to break.

Scroll the crafting menu by looking left and right.

DEMO Version: Right click to scroll recipes, Shift Right click to craft

Q: How do I find put accessories on items?

First you need a tinkerer's workshop obtainable from a tinkerer villager. (can be found in villages or created through a profession_certificate obtained from wandering traders)

To use it, Right click with your desired armor, then Right click with your desired accessory.

Q: Items from the previous version arn't working!

Due to the jump from 1.20.2 to 1.21, most of the items had their code broken, so we dropped support for items from the DEMO all together. Items may break between future updates due to similar reasons.

Extra Addons

Custom Music Custom Biomes
Music Resources Biome Datapack

All Versions

+ Add Version
Name Game version Platforms Published Downloads Actions
1.21.4
Fabric Forge Neoforge Quilt
12h ago 1
1.21.4
Fabric Forge Neoforge Quilt
12h ago 1
1.21.3
Fabric Forge Neoforge Quilt
12h ago 1
1.21.4
Datapack
12h ago 1
1.21.3
Datapack
12h ago 1
1.21.3
Fabric Forge Neoforge Quilt
12h ago 1
1.21.4
Fabric Forge Neoforge Quilt
12h ago 1
1.21.3
Datapack
12h ago 1
1.21.4
Datapack
12h ago 1
1.21.x
Fabric Forge Neoforge Quilt
12h ago 1
1.21.x
Fabric Forge Neoforge Quilt
12h ago 1
1.21.x
Datapack
12h ago 1
1.21.x
Datapack
12h ago 1
1.21.x
Fabric Forge Neoforge Quilt
12h ago 1
1.21.x
Datapack
12h ago 1
1.20.x
Fabric Forge Quilt
12h ago 1
1.20.x
Datapack
12h ago 1
# Changes

Resprited:

>abyssal_amulet,
>amidias_spark,
>coin_of_deceit,
>energy_core,
>wulfrum_metal_scrap,
>essence_of_eleum,
>essence_of_havoc,
>essence_of_sunlight,
>marksman_round,
>pearl_shard,
>sahara_slicer,
>sea_remains,
>stormlion_mandible,
>voltaic_jelly,
>wulfrum_battery,
>wulfrum_digging_turtle,
>crown_jewel,
>aero_stone,
>glimmering_gemfish,
>stuffed_fish,
>enchanted_starfish,
>fallen_starfish,
>rover_drive,
>blood_orb

Changed Item models of most custom blocks to no longer use sprites

Removed 32x item sprites for:
> bladeofgrass,
> depth_crusher,
> muramasa,
> redtide_spear,
> teardrop_cleaver

Resprited stealth bar.

Removed sprites for some unobtainable quest fish, bait, and unused rage and adrenaline - we cannot be bothered to remake those sprites at this very second.
# Fixes:

Some slime based custom mobs spawning far away wern't disabled correctly and could die, causing a build up of invisible slimes.
# Fixes:

Some slime based custom mobs spawning far away wern't disabled correctly and could die, causing a build up of invisible slimes.
# Fixes (0.2.4):

Some slime based custom mobs spawning far away wern't disabled correctly and could die, causing a build up of invisible slimes.

# Changes (0.2.5 July 25 2025)

Resprited:

>abyssal_amulet,
>amidias_spark,
>coin_of_deceit,
>energy_core,
>wulfrum_metal_scrap,
>essence_of_eleum,
>essence_of_havoc,
>essence_of_sunlight,
>marksman_round,
>pearl_shard,
>sahara_slicer,
>sea_remains,
>stormlion_mandible,
>voltaic_jelly,
>wulfrum_battery,
>wulfrum_digging_turtle,
>crown_jewel,
>aero_stone,
>glimmering_gemfish,
>stuffed_fish,
>enchanted_starfish,
>fallen_starfish,
>rover_drive,
>blood_orb

Changed Item models of most custom blocks to no longer use sprites

Removed 32x item sprites for:
> bladeofgrass,
> depth_crusher,
> muramasa,
> redtide_spear,
> teardrop_cleaver

Resprited stealth bar.

Removed sprites for some unobtainable quest fish, bait, and unused rage and adrenaline - we cannot be bothered to remake those sprites at this very second.
# Fixes:

Some slime based custom mobs spawning far away wern't disabled correctly and could die, causing a build up of invisible slimes.
  • File changed because textures were missing-

# Fixes:

Fixed Wulfrum Digging Turtle not working

Fixed Milk not working on custom potion effects

Fixed Yellow Slimes taking fall damage from jumping

Changed "Veiw debug menu:" to "View debug menu:"

Fixed Tinkers Workshop not being obtainable

Actually fixed Slime Rain event timer restarting occasionally
  • File changed because textures were missing-

# Fixes:

Fixed Wulfrum Digging Turtle not working

Fixed Milk not working on custom potion effects

Fixed Yellow Slimes taking fall damage from jumping

Changed "Veiw debug menu:" to "View debug menu:"

Fixed Tinkers Workshop not being obtainable

Actually fixed Slime Rain event timer restarting occasionally



# Changes

Now in 1.21.4!

Reworked ALL the models to 1.21.4's new item model system

Added new item sprites for:

Diving Helmet, 0x33 Aviators, Sunglasses, Goggles, Wulfrum Prosthesis, Scourge of the Desert, Spawn Eggs based on 1.21.5 spawn eggs, Reforge Item

Added new held models for:

Wooded Yoyo, Amazon, Artery, Malaise, Riptide, Blade of Grass, Depth Crusher, Muramasa, Bone Javalin, Teardrop Cleaver, Redtide Spear, Dry Bomb, Honey Bomb, Lava Bomb, Wet Bomb, Seafoam Bomb, Wulfrum Digging Turtle

Added animation for Blood Rain Bow

Magic items can now be used in creative even if you haven't collected any experience
# Fixes:

Fixed Wulfrum Digging Turtle not working

Fixed Milk not working on custom potion effects

Fixed Yellow Slimes taking fall damage from jumping

Changed "Veiw debug menu:" to "View debug menu:"

Fixed Tinkers Workshop not being obtainable

Actually fixed Slime Rain event timer restarting occasionally
# Fixes:

Fixed Wulfrum Digging Turtle not working

Fixed Milk not working on custom potion effects

Fixed Yellow Slimes taking fall damage from jumping

Changed "Veiw debug menu:" to "View debug menu:"

Fixed Tinkers Workshop not being obtainable

Actually fixed Slime Rain event timer restarting occasionally



# Changes

Now in 1.21.4!

Reworked ALL the models to 1.21.4's new item model system

Added new item sprites for:

Diving Helmet, 0x33 Aviators, Sunglasses, Goggles, Wulfrum Prosthesis, Scourge of the Desert, Spawn Eggs based on 1.21.5 spawn eggs, Reforge Item

Added new held models for:

Wooded Yoyo, Amazon, Artery, Malaise, Riptide, Blade of Grass, Depth Crusher, Muramasa, Bone Javalin, Teardrop Cleaver, Redtide Spear, Dry Bomb, Honey Bomb, Lava Bomb, Wet Bomb, Seafoam Bomb, Wulfrum Digging Turtle

Added animation for Blood Rain Bow

Magic items can now be used in creative even if you haven't collected any experience
# Changes:

Reworked the backend of the datapack

  • Previously unloaded entities may be frozen for up to 20 minutes

  • All current active effects will be deleted

Added new sprites for:

  • Failed Sunken Compass

  • Creative Menu

Added Essence of Eleum, Havoc, and Sunlight (all unobtainable)

Music profiles for Noteblocc, TehBigMac, and NotGleam use the plushes now.


# Fixes:

Wulfrum Blunderbus not reloading

Custom Projectiles can now hit boats, minecarts, end crystals, item frames, leash knots, paintings, shulker bullets

Lang issues with boss summons and fishing bobbers

Attempted to Add a fix for yharon's head not despawning sometimes

Changed tungsten_leggings id from " tungsten_leggings" to "tungsten_leggings"

Desert Scourge and Desert Nuisance now have damage tints

Fixed transparency on Tomb Crawler body

Tomb Crawler now has damage tint

Fixed model of Amidias Pendent shards

Fixed link to wiki in the manual

(also ported over the better version of the wiki that got privated because whoopsies)

# Additions:

Added the Item Updater block, which will attempt to update all calamity items in your inventory

  • MANY Items have been redesigned because of new data driven additions in 1.21.2

  • You will get one for free if you update, but you can also craft them if you think they look pretty.

  • May eventually expand to fixing entities as well... because custom_model_data is obsolete in the next update



# Changes:

Every fix that was added for the 1.21.1 version

Many weapons now "charge" instead of use instantly

You can now "unreel" a yoyo by recasting while a yoyo exists

Yoyos now spin

Some accessories now need you to jump instead of sneak

Added new sounds for equipping arctic_diving_gear, jellyfish_diving_gear, goggles, sunglasses, and 0x33_aviators

Yharon's model code is slightly different.

  • Fixed yharon not flying away fast enough when killed

  • Fixed yharon's death animation being rotated in certain circumstances

Entities no longer spawn disabled

Removed bundles from UGcabin loot (because its obtainable now)


# Additions:

Added the Item Updater block, which will attempt to update all calamity items in your inventory

  • MANY Items have been redesigned because of new data driven additions in 1.21.2

  • You will get one for free if you update, but you can also craft them if you think they look pretty.

  • May eventually expand to fixing entities as well... because custom_model_data is obsolete in the next update



# Changes:

Every fix that was added for the 1.21.1 version

Many weapons now "charge" instead of use instantly

You can now "unreel" a yoyo by recasting while a yoyo exists

Yoyos now spin

Some accessories now need you to jump instead of sneak

Added new sounds for equipping arctic_diving_gear, jellyfish_diving_gear, goggles, sunglasses, and 0x33_aviators

Yharon's model code is slightly different.

  • Fixed yharon not flying away fast enough when killed

  • Fixed yharon's death animation being rotated in certain circumstances

Entities no longer spawn disabled

Removed bundles from UGcabin loot (because its obtainable now)


# Changes:

Reworked the backend of the datapack

  • Previously unloaded entities may be frozen for up to 20 minutes

  • All current active effects will be deleted

Added new sprites for:

  • Failed Sunken Compass

  • Creative Menu

Added Essence of Eleum, Havoc, and Sunlight (all unobtainable)

Music profiles for Noteblocc, TehBigMac, and NotGleam use the plushes now.


# Fixes:

Wulfrum Blunderbus not reloading

Custom Projectiles can now hit boats, minecarts, end crystals, item frames, leash knots, paintings, shulker bullets

Lang issues with boss summons and fishing bobbers

Attempted to Add a fix for yharon's head not despawning sometimes

Changed tungsten_leggings id from " tungsten_leggings" to "tungsten_leggings"

Desert Scourge and Desert Nuisance now have damage tints

Fixed transparency on Tomb Crawler body

Tomb Crawler now has damage tint

Fixed model of Amidias Pendent shards

Fixed link to wiki in the manual

(also ported over the better version of the wiki that got privated because whoopsies)
# Changes

Now in 1.21

You can now unsummon summons by shift clicking a summon staff

break particles appear on the surface when worms move

Events can now occur in the world

Changed Throwing Brick, Urchin Stinger, Wulfrum Knife, & all glowstick varients to stack to 64

Changed Sapphire, Ruby, & Lonsdaleite to stack to 64

Changed Apple Juice, Fruit Juice, Return Potion, Recall Potion & Teleportation Potion to stack to 16

All weapons now list their attribute stats

New Stealth system along with the following attributes:

  • Max Stealth

  • Stealth Regen

  • Stealth Cost

Changed model of desert Scourge and desert Nuisance

Cnidrion now drops sturdy fossils

Worms are now coded better

BETTER CRAFTING MENU!!!!!!!!!!!



# Additions

## New Events

Slime Rain

Blood Moon

Natural Eye of Cthulhu



## New Bosses

King Slime

Yharon



## New Enemies

Colored Slimes!

  • Comes in blue, yellow, red, pink, purple, and spikey variaties

Wulfrum Patrols

  • Drones

  • Hovercrafts

  • Gyrators

  • Rovers

  • Amplifiers

Clam

Prismback

Ghost Bell

Utrophic Ray

Giant Clam

Blood Zombie

Drippler

Zombie Merman

Wandering Eye Fish



## New Items

King slime drops:

  • Slime Gun

  • Crown Jewel

  • Royal Gel

  • Ninja Armor

  • Slime Staff

Leftover desert stuff:

  • Ancient Chisel

  • Storm Surge

  • Luxors Gift

  • Encumbering Stone

  • Greatbay Pickaxe

  • Reefclaw Hamaxe

  • Urchin Mace

Wulfrum Gear:

  • Wulfrum Battery

  • Rover Drive

  • Wulfrum Blunderbuss

  • Wulfrum Digging\_turtle

  • Wulfrum Metal\_scrap

  • Wulfrum Drill

  • Wulfrum Screwdriver

  • Wulfrum Prosthesis

  • Wulfrum Controller

  • Wulfrum Armor

  • Wulfrum Lure

Sunken Sea Gear:

  • Aquamarine Staff

  • Prism Shard

  • Seashine Sword

  • Voltaic Jelly

  • Giant Pearl

  • Riptide

  • Sparkling Empress

  • Seafoam Bomb

  • Amidias Pendant

Blood Moon stuff:

  • Blood Rain Bow

  • Vampire Frog Staff

More Banners!

Fishing Rework:

  • MANY Fish

  • MANY Crates

  • MANY Baits

  • Potions:

  • Fishing Potion

  • Crate Potion

  • Sonar Potion

Crab Claw

Flash Rounds

Coin Of Deceit

Gilded Dagger

Gleaming Dagger

Starfury

Yoyos!

Bone Sword

Grenade

Raiders Talisman

Scuttlers Jewel

Crystalline

New Potions!



## New Structures

Floating Island

Living Tree

Desert Shrine
[0.2.0] The Sunken Update by Unknown on Oct 16, 2026
Download
# Changes

Now in 1.21

You can now unsummon summons by shift clicking a summon staff

break particles appear on the surface when worms move

Events can now occur in the world

Changed Throwing Brick, Urchin Stinger, Wulfrum Knife, & all glowstick varients to stack to 64

Changed Sapphire, Ruby, & Lonsdaleite to stack to 64

Changed Apple Juice, Fruit Juice, Return Potion, Recall Potion & Teleportation Potion to stack to 16

All weapons now list their attribute stats

New Stealth system along with the following attributes:

  • Max Stealth

  • Stealth Regen

  • Stealth Cost

Changed model of desert Scourge and desert Nuisance

Cnidrion now drops sturdy fossils

Worms are now coded better

BETTER CRAFTING MENU!!!!!!!!!!!



# Additions

## New Events

Slime Rain

Blood Moon

Natural Eye of Cthulhu



## New Bosses

King Slime

Yharon



## New Enemies

Colored Slimes!

  • Comes in blue, yellow, red, pink, purple, and spikey variaties

Wulfrum Patrols

  • Drones

  • Hovercrafts

  • Gyrators

  • Rovers

  • Amplifiers

Clam

Prismback

Ghost Bell

Utrophic Ray

Giant Clam

Blood Zombie

Drippler

Zombie Merman

Wandering Eye Fish



## New Items

King slime drops:

  • Slime Gun

  • Crown Jewel

  • Royal Gel

  • Ninja Armor

  • Slime Staff

Leftover desert stuff:

  • Ancient Chisel

  • Storm Surge

  • Luxors Gift

  • Encumbering Stone

  • Greatbay Pickaxe

  • Reefclaw Hamaxe

  • Urchin Mace

Wulfrum Gear:

  • Wulfrum Battery

  • Rover Drive

  • Wulfrum Blunderbuss

  • Wulfrum Digging\_turtle

  • Wulfrum Metal\_scrap

  • Wulfrum Drill

  • Wulfrum Screwdriver

  • Wulfrum Prosthesis

  • Wulfrum Controller

  • Wulfrum Armor

  • Wulfrum Lure

Sunken Sea Gear:

  • Aquamarine Staff

  • Prism Shard

  • Seashine Sword

  • Voltaic Jelly

  • Giant Pearl

  • Riptide

  • Sparkling Empress

  • Seafoam Bomb

  • Amidias Pendant

Blood Moon stuff:

  • Blood Rain Bow

  • Vampire Frog Staff

More Banners!

Fishing Rework:

  • MANY Fish

  • MANY Crates

  • MANY Baits

  • Potions:

  • Fishing Potion

  • Crate Potion

  • Sonar Potion

Crab Claw

Flash Rounds

Coin Of Deceit

Gilded Dagger

Gleaming Dagger

Starfury

Yoyos!

Bone Sword

Grenade

Raiders Talisman

Scuttlers Jewel

Crystalline

New Potions!



## New Structures

Floating Island

Living Tree

Desert Shrine
MC Calamity Icon
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