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 |
|---|---|
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All Versions
+ Add VersionResprited:
>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.
Some slime based custom mobs spawning far away wern't disabled correctly and could die, causing a build up of invisible slimes.
Some slime based custom mobs spawning far away wern't disabled correctly and could die, causing a build up of invisible slimes.
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.
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
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
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
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)
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)
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)
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)
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
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

