Unusual Spawning

An addon for Unusual Prehistory 2 that add natural spawning system for both mob and plants

4.9K Downloads

datapackforgemobsworldgen

Rent Server with this Mod

Screenshots

Hibbertopterus hanging around the swamp biomes

Dunkleosteus hunting on dolphin in Deep Ocean

About this Mod

This addon will add a natural spawn system to both mobs and plants from Unusual Prehistory 2 mods that exist on their respective biome.

List of Mob biomes

Spoiler

Carnotaurus - Savanna, Badlands
Diplocaulus - Swamp, Mangrove Swamp
Dromaeosaurus - Plains, Forests
Dunkleosteus - Warm Ocean, Lukewarm Ocean
Jawless Fish - Warm Ocean, Lukewarm Ocean
Kentrosaurus - Plains, Jungle, Savanna, Forests
Kimmeridgebrachypteraeschnidium - Swamp, Beach
Majungasaurus - Jungles, Beach
Megalania - Savanna
Metriorhynchus - Warm Ocean, Lukewarm Ocean
Onchopristis - Rivers
Stethacanthus - Warm Ocean, Lukewarm Ocean
Talpanas - Dark Forest, Lush Caves, Beach
Tartuosteus - Warm Ocean, Lukewarm Ocean, Deep Ocean, Deep Lukewarm Ocean, Ocean
Telecrex - Plains, Meadow, Savanna
Kaprosuchus - Savanna
Desmatosuchus - Swamp
Lystrosaurus - Swamp
Pachycephalosaurus - Badlands
Psilopterus - Savanna
Leptictidium - Desert, Badlands
Ulughbegsaurus - Plains, Beach
Coelacanthus - Deep Ocean
Lobe Finned Fish - River
Hibbertopterus - Swamps
Pterodactylus - Caves, Beach
Brachiosaurus - Sparse Jungle
Praepusa - Frozen Ocean, Snowy Beach
Aegirocassis - Deep Ocean
Mosasaurus - Deep Ocean

List of Plants biome

Spoiler

Gingko - Forests
Lepidodendron - Swamps
Bennettitales - Badlands, Deserts
Calamophyton - Swamps
Cladophlebis - Swamps, Forests, Jungles
Cooksonia - Meadow, Plains
Horsetail - Swamps, Forests, Jungles
Giant Horsetail - Swamps, Forests, Jungles
Leefructus - Swamps, Forests, Jungles, Plains
Moss Layer - Swamps
Quillwort - Swamps, Rivers
Raiguenrayun - Sunflower Plains
Rhynia - Swamps, Beach
Aethophylllum - Jungles, Swamp
Archaeosigillaria - Swamp
Brachyphyllum - Old Growth Taiga, Swamp
Neomariopteris - Badlands, Desert
Tempskya - Old Growth Taiga
Delitzschala Stalk - Swamps
Zhangsolva Bloom - Sunflower Plains

This addon is also compatible with:

Special Thanks to:

Unusual Prehistory 2 Team for creating the mod
Platypus, for helping and tweaking the spawn system

If you found any problem or bugs, please report to the comment section or discord server

Available Versions

Unusual Spawning Datapack 1.3.1release

MC 1.20, 1.20.1datapack

April 2, 2026

Unusual Spawning 1.3.1release

MC 1.20.1forge

April 2, 2026

Unusual Spawning Datapack 1.3release

MC 1.20, 1.20.1datapack

April 2, 2026

Unusual Spawning 1.3release

MC 1.20.1forge

April 2, 2026

Unusual Spawning Datapack 1.2.1release

MC 1.20, 1.20.1datapack

January 28, 2026

How to Install Unusual Spawning on Your Server

Order Server

Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).

Set datapack Loader

In the panel under "Egg", select the datapack loader and matching Minecraft version (1.20.1).

Install Mod

Open the mod browser in the dashboard and search for "Unusual Spawning". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

datapackforge

Minecraft Versions

1.20.1, 1.20

Server-side

✓ Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

Unusual Spawning server crashes on startup – what to do?

Most common cause: wrong datapack version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.20.1). You can switch loaders with one click in the panel.

Is Unusual Spawning compatible with datapack and forge?

Unusual Spawning officially supports datapack, forge for Minecraft 1.20.1, 1.20. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Unusual Spawning – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Unusual Spawning consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.