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About Unusual Prehistory 2
Unusual Prehistory 2 is a complete remake of Unusual Prehistory! This mod adds the ability to revive a variety of prehistoric creatures and plants with various ways to interact with them.
Quick Start Guide
To begin your journey to resurrect prehistoric plants and animals, you need to find fossils found throughout the world. Fossils can be found in various biomes on the surface, including plains, badlands, stony shores, mountains, and swamps. Once you find a fossil, use a brush to dust off the matrix blocks and then break the revealed fossil bed with a pickaxe! Fossils are only step one though, to revive prehistoric plants and animals you need a transmogrifier. Abandoned Labs can be found in forest biomes occasionally and inside you can find a transmogrifier. To fuel the transmogrifier you need to create some organic ooze, which can be crafted with rotten flesh, slime balls, milk, and sugar. When Farmer's Delight is installed, organic ooze is crafted with a Cooking Pot instead.
Mod Loader and Version
This mod is currently being developed for NeoForge 1.21.1. No backports are planned.
All Versions
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[2.0.0-beta3] Unusual Prehistory 2 2.0.0-beta3
by Ghoul-Ish on Sep 25, 2026
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- Fixed structure processors not being registered
- Fixed leedsichthys not staying in place when ordered to sit
- Fixed unusual fossil bed loot table in cliff fossils
- Fossil beds and matrices now obey gravity like suspicious blocks
- Tweaked the amount of matrices that can spawn in cliff fossils
- Tweaked cliff fossil loot tables, junk now only drops sometimes and fossils always drop
[2.0.0-beta2] Unusual Prehistory 2 2.0.0-beta2
by Ghoul-Ish on Sep 24, 2026
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- Fixed Teal Lib crash when hovering over ammonite buckets
- Fixed cliff fossil loot tables
- Fixed leedsichthys not pathfinding up or down
- Fixed unusual fossil bed missing pickaxe mineable tag
- Tweaked cliff fossil loot weights (fossils weighted more than junk)
- Mod now requires Sinew 1.2.10 or higher
[2.0.0-beta1] Unusual Prehistory 2 2.0.0-beta1
by Ghoul-Ish on Sep 24, 2026
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- Began rewrite of the mod from the ground up
- First beta of the mod rewrite
- Mod now requires Sinew 1.2.9 or higher
- Added Leedsichthys
- Added Ammonites
- Added Abandoned Labs
- Added Cliff Fossils
[1.20.1-1.4.3] Unusual Prehistory 2 1.20.1-1.4.3
by Ghoul-Ish on Apr 03, 2026
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## Version 1.4.3
- Fixed metasequoia and dryophyllum leaves dropping ginkgo fruit
- Fixed pachycephalosaurus banner pattern not being tagged as a mesozoic banner pattern
- Slightly decreased the rarity of fossil sites
- Fossil sites now have more fossils than junk items (around 60% fossils and 40% junk)
- Misc tweaks
[1.20.1-1.4.2] Unusual Prehistory 2 1.20.1-1.4.2
by Ghoul-Ish on Apr 02, 2026
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## Version 1.4.2
- Updated Simplified Chinese translations thanks to Oldazhai
- Mobs now rotate their head first before their body when moving
- Tweaked body rotation values a bit
- Time on land and time on water is no longer saved data for semiaquatic mobs
- Fixed semiaquatic mobs not prioritizing leaving/entering water over wandering
- Fixed living ooze despawning
- Following mobs will now teleport when you are 16 blocks away and sprint when 8 blocks away
- Mosasaurus and praepusa now use their food tags for temporary pacification to be more consistent
- Temporary pacification time has been increased to 1 hour
- Mobs can now be fed their food item to heal them
- Misc tweaks
[1.20.1-1.4.1] Unusual Prehistory 2 1.20.1-1.4.1
by Ghoul-Ish on Apr 01, 2026
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## 1.4.1
- Crash fix
[1.20.1-1.4.0] Unusual Prehistory 2 1.20.1-1.4.0
by Ghoul-Ish on Apr 01, 2026
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## Version 1.4.0
- Added Aegirocassis
- Added Desmatosuchus
- Added Mosasaurus
- Added Psilopterus
- Added Delitzschala ambient mob
- Added Zhangsolva ambient mob
- Both ambient mobs spawn from their respective plants
- Added banner patterns for mob icons
- Added Pummel and Snatch disc
- Removed unfinished 1.3 and future mobs
- Added carnotaurus headbutt vocal sound
- Increased golden emperor carnotaurus variant spawn chance by 5%
- Fixed potted metasequoia model
- Fixed random sit goal
- Praepusa now sleeps on the surface of water at night
- Overhauled advancements
- Patchouli is now a required dependency
- Paleopedia is now a custom item instead of the normal patchouli book
- Fixed many paleopedia errors
- Added many new entries to paleopedia related to progression
- Increased coelacanthus max size cap to 200
- Coelacanthus will continue to eat mobs even if max size unless pacified
- Added missing coelacanthus food tags
- Switched some raft eggs to water eggs
- Fixed lystrosaurus not playing its walk animation when walking underwater
- Fixed pachycephalosaurus not playing recover animation after sparring
- Tweaked most mob and item tags
- Metriorhynchus is now tamable with a bucket of tropical fish
- Metriorhynchus and ulughbegsaurus now heal a bit of health on kill
- Kaprosuchus and megalania can now be ordered to sit still in water
- Overhauled loot tables for fossil structures. Now there are common, uncommon, rare, and epic fossil and junk loot tables for each era
- Adjusted the rarity of fossil geodes
- Changed variant names for diplocaulus and dunkleosteus to be more generic
- Dunkleosteus variants now spawn based on the depth of the water or randomly if they spawn on land, deeper equals bigger. Any depth above 12 is large, above 6 is medium, and any shallower is small
- Moved all mob textures and sounds to entity/mob/
- Decreased dromaeosaurus speed
- Increased dromaeosaurus run distance
- Dromaeosaurus will now stop sometimes for a very brief period
- Jawless fish and dunkleosteus no longer prefer swimming toward the bottom of water
- Added tail rotations to many mobs
- Diplocaulus can now perform a boomerang dash in water
- Fixed mobs sometimes moving sideways
- Mob rotations are now smoother
- Many misc tweaks and fixes
[1.20.1-1.3.1] Unusual Prehistory 2 1.20.1-1.3.1
by Ghoul-Ish on Mar 23, 2026
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## Version 1.3.1
- Fixed semiaquatic mobs getting stuck in water
- Fixed some pachycephalosaurus animations not playing
- Tweaked kaprosuchus leap attack
- Increased brachiosaurus health to 400
- Mobs will no longer sleep when following their owner
- Changed pachycephalosaurus warn sound
- Fixed carnotaurus animations not playing properly
- Misc tweaks
[1.20.1-1.3.0] Unusual Prehistory 2 1.20.1-1.3.0
by Ghoul-Ish on Mar 23, 2026
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## Version 1.3.0
- Added Brachiosaurus
- Added Coelacanthus
- Added Hibbertopterus
- Added Kaprosuchus
- Added Leptictidium
- Added Lobe Finned Fish
- Added Lystrosaurus
- Added Pachycephalosaurus
- Added Praepusa
- Added Pterodactylus
- Added Ulughbegsaurus
- Added many new plants
- Removed fossil site maps and changed how fossils generate
- Many misc tweaks, fixes, and additions
[1.20.1-1.2.3] Unusual Prehistory 2 1.20.1-1.2.3
by Ghoul-Ish on Dec 09, 2025
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## Version 1.2.3
- Fixed a server crash
[1.20.1-1.2.2] Unusual Prehistory 2 1.20.1-1.2.2
by Ghoul-Ish on Dec 09, 2025
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## Version 1.2.2
- Added improved path navigation
- Tweaked semiaquatic navigation switching
- Reduced Metriorhynchus jump distance
- Metriorhynchus swims more often
- Changed priority for avoiding mobs in some mobs
- Added Tartuosteus to big Dunkleosteus targets
- Fixed Dunkleosteus bite animations
- Carnotaurus headbutts less often
- Slightly increased the range for Telecrex to start scattering
- Reduced Telecrex max hp to match Talpanas
- Reduced Telecrex flight interval
- Added a hover, takeoff, and fast flying animation to Telecrex
- Telecrex flies away from danger faster
- Telecrex flies a little bit faster
- Added Carnotaurus and Metriorhynchus to scatters_telecrex tag
- Removed Kentrosaurus and other passive mobs from scatters_telecrex tag
- Added Talpanas shake animation
- Added Talpanas run animation
- Talpanas now seeks shelter from sunlight and bright lights, with a light threshold of 5
- Fixed some PrehistoricMob data not being saved to bucketed mobs
- Changed Dunkleosteus, Onchopristis, and Jawless Fish ground seeking to be a bit better
- Onchopristis and Dunkleosteus swim more often
- Added more Kentrosaurus idle animations
- Misc tweaks
[1.20.1-1.2.1] Unusual Prehistory 2 1.20.1-1.2.1
by Ghoul-Ish on Dec 08, 2025
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## Version 1.2.1
- Fixed a crash with Oculus
- Metriorhynchus death roll now has a size limit, along with two tags to control what it can carry
- Improved Metriorhynchus death roll visuals
[1.20.1-1.2.0] Unusual Prehistory 2 1.20.1-1.2.0
by Ghoul-Ish on Dec 07, 2025
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## Version 1.2.0
- Added Metriorhynchus
- Added Tartuosteus
- Added Living Ooze
- Tweaked mob stats
- Tweaked Dunkleosteus stats per variant
- Dunkleosteus can now attack outside of water
- Majungasaurus now attacks faster
- Carnotaurus now attacks faster
- Increased duration for Carnotaurus roar buffs
- Increased health gain when Carnotaurus kills a mob
- Carnotaurus now has a running animation when aggro
- Majungasaurus now has a running animation when aggro
- Tweaked spawn egg colors for Stethacanthus and Talpanas
- Talpanas now drops feathers
- Added spawnable block tags for all mobs that can spawn on ground
- Added Stethacanthus bite sound
- Added Megalania tail whip sounds
- Added Megalania bite sounds
- Fixed bucketed mobs losing their age value
- Talpanas and Telecrex are no longer immune to suffocation
- Removed revive ginkgo and revive lepidodendron advancements
- Split revival advancements into different groups and reordered some advancements
- Added a section for eggs and embryos to the revival category of the paleopedia
- Fixed some jawless fish variants not tilting
- Reduced range needed for majungasaurus to enter stealth mode
- Reduced interval for mob auto healing
- Fixed Kentrosaurus taking damage twice every time it gets hurt
- Fixed Kentrosaurus attack animation being reset if it gets hit during it
- Reduced Kentrosaurus hitbox size
- Increased Kentrosaurus attack range
- Megalania is no longer fire immune in the nether
- Megalania heals faster in warmer biomes and slower in cold biomes
- Increased Megalania speed
- Megalania is now hostile to everything, including other megalania, in the nether
- Megalania tail whip can hit up to 3 targets at once
- Nether Megalania heal on kill
- Fixed Megalania attack animation being reset if it gets hit during it
- Megalania is now immune to poison and also wither while in the nether
- Megalania will no longer run when cold
- Megalania tail whip attack vertical range is now much shorter
- Megalania follow range now depends on its temperature
- Added 3 new idle animations for the different Megalania temperature states
- Fixed Carnotaurus roar not having a subtitle translation
- Increased the radius for Dromaeosaurus run positions
- Fixed Onchopristis overriding death poof effects
- Increased chance of finding machine parts
- Mossy dirt can now spread like grass and mycelium
- Added calamophyton feature
- Talpanas forgot how to swim
- Updated Doomsurf disc
- Tweaked swimming ai
- Added enter water goal for Diplocaulus
- Tweaked exit water goal to be more consistent
- Carnotaurus no longer attacks on sight in peaceful mode
- Dunkleosteus no longer attacks Stethacanthus
- Large Dunkleosteus can now attack Guardians
- Guardians are now scared of Dunkleosteus
- Dunkleosteus does double damage to Guardians
- Reduced interval for Talpanas seeking shelter
- Added Simplified Chinese translations thanks to Oldazhai!
- Misc tweaks
[1.20.1-1.1.2] Unusual Prehistory 2 1.20.1-1.1.2
by Ghoul-Ish on Nov 28, 2025
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## Version 1.1.2
- Fixed Kimmeridgebrachypteraeschnidium nymphs being able to despawn
[1.20.1-1.1.1] Unusual Prehistory 2 1.20.1-1.1.1
by Ghoul-Ish on Nov 28, 2025
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## Version 1.1.1
- Onchopristis no longer attacks after getting stepped on if it is pacified
- Updated Dromaeosaurus entry in the Paleopedia
- Added images for each mob entry in the Paleopedia
- Changed persistence rules so aquatic mobs can despawn when spawning naturally
- Changed tempt goal priorities to be prioritized over wandering
- Changed Jawless Fish mob category to water ambient
[1.20.1-1.1.0] Unusual Prehistory 2 1.20.1-1.1.0
by Ghoul-Ish on Nov 28, 2025
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## Version 1.1.0
- Added Onchopristis
- Added a new music disc "Doomsurf" by ChipsTheCat
- Added a new music disc "MEGALANIA" by ValiantEnvoy
- Added optional compatibility with Patchouli, adding a Paleopedia guidebook with information on various systems and mobs (currently quite incomplete)
- Fixed Mossy Lepidodendron Wood not being craftable
- Added targeting tag for Carnotaurus
- Added a separate sound event for Megalania step sounds
- Fixed a z-fighting issue on the Furcacauda model
- Kimmeridgebrachypteraeschndium no longer drowns to prevent unwanted deaths when a nymph grows up
- Leashed Prehistoric mobs no longer take any fall damage
- Kentrosaurus is now immune to thorns, sweet berry, and cactus damage
- Kentrosaurus can now pathfind onto cactus and sweet berry bushes
- Kentrosaurus will now attack any nearby players who break cactus or sweet berry bushes
- Kentrosaurus will now follow and defend any mob wearing thorns armor
- Updated Carnotaurus charging, splitting it into three animations rather than one
- Carnotaurus now attacks monsters and animals, they will continue to attack monsters even when pacified
- Carnotaurus headbutt attack can now hit up to 3 targets at once
- Carnotaurus roar now gives the carnotaurus regeneration for a short duration
- Carnotaurus now heals a small amount of health on kill
- Increased the amount of suspicious blocks per fossil, petrified tree, and tar pit structures
- Fossils can now spawn in deserts and badlands
- Fossil Site maps are now separated into different maps for each structure, each with their own icon
- Replaced all fossil site structures with new ones representing each relevant creature in the mod
- Fossils spawn closer to the surface
- Fossils now contain 3 different loot tables: common, rare, and epic, with epic being the only one containing fossils but also with zero junk items
- Added a new array of junk items to common and rare fossil loot tables
- Added random rotations to some egg blockstates
- Fixed water eggs and underwater eggs hatching too quickly
- Miscellaneous tweaks
[1.20.1-1.0.0] Unusual Prehistory 2 1.20.1-1.0.0
by Ghoul-Ish on Nov 23, 2025
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- Initial Release
