The ocean is no longer just a place to explore. It is where the real game begins.

Changed Siren Course is a large-scale survival and exploration modpack for Minecraft 1.20.1, built around the Changed universe and heavily expanded with ocean exploration, deeper seas, dangerous creatures, abandoned structures, horror elements, survival mechanics, technology, magic, and a large amount of new content.

The world may look familiar when you first enter it.

It isn't.

The oceans have been completely transformed and are now one of the major parts of the gameplay experience.

With Deeper Oceans, Aquaculture, Upgrade Aquatic, Aquamirae, Alex's Caves, underwater villages, ruins, lost cities, and numerous additional structures, the sea is no longer an empty biome between continents.

Explore enormous underwater landscapes, discover forgotten places, search for resources, and descend into areas where the darkness hides more than just fish.

The deeper you go, the less certain it becomes that you should continue.

At the heart of the pack is Changed and its addons.

Transformation is not simply a cosmetic feature. It becomes part of the survival experience.

Your interaction with the world, water, and latex creatures can fundamentally change the way you play.

The pack also includes additional Changed content and survival mechanics specifically adapted to this environment.

This pack also includes my own mod:

Changed Siren Course

It expands the Changed experience with marine-focused mechanics, resources, and progression.

Among its features:

• Mermaid Shark / Merman Shark gameplay
• Water-dependent survival mechanics
• A water moisture and hydration system — you need to regularly stay in the water and swim; on land, even under ideal conditions, you can survive for around 3 days
• Transformation and dehydration mechanics
• The Sirens' Crucible
• S-SH Mixture and other unique items
• TUALIZIUM — a rare resource hidden on the ocean floor
• Crafting and use of TUALIZIUM
• Custom music and atmospheric effects
• A large above-water structure — a submarine
• Custom achievements and discoveries

The ocean is no longer just scenery.

It is part of your survival.

The world is filled with new structures and locations to discover.

You may encounter:

• Underwater villages
• Abandoned settlements
• Ancient villages
• Lost cities
• Fortresses
• Pillager structures
• Shipwrecks and other ocean locations
• Giant wreckage
• A large above-water structure — a submarine
• Dangerous caves and underground environments
• Numerous additional structures from different world-generation mods

Some locations contain useful resources.

Others contain things you probably weren't prepared to encounter.

The sea is filled with new creatures and wildlife.

Alex's Mobs, Aquaculture, Upgrade Aquatic, Aquamirae, and other mods add a huge variety of marine life and dangerous creatures.

Fishing has also been significantly expanded, with new fish, equipment, and aquatic resources.

The ocean should feel alive.

Sometimes that's a good thing.

This is not a peaceful exploration pack.

The world is filled with new enemies, bosses, structures, and dangerous encounters.

Fight your way through hostile locations, discover powerful equipment, and prepare yourself before entering places that clearly aren't meant for the unprepared.

The pack includes content from mods such as:

L_Ender's Cataclysm
Alex's Caves
Changed
Aquamirae
Dungeons Arise: Seven Seas
Alex's Mobs
and many others.

There are plenty of reasons to leave your safe house.

And just as many reasons to regret it.

The pack isn't limited to survival and exploration.

Build your own infrastructure and develop your character using systems from:

Botania

Modern Industrialization

Sophisticated Backpacks

Farmer's Delight

Aquaculture

and many other mods.

Build farms, automate resource production, develop technology, experiment with magic, and create your own base while the world around you becomes increasingly dangerous.

This pack is designed to be played with sound.

Environmental audio, underwater ambience, sound physics, custom music, and visual effects are used to create a more immersive world.

Put on your headphones.

Go underwater.

🗺️ Exploration Comes First

There is no single correct way to play Changed Siren Course.

You can:

Explore the expanded oceans and structures.

Build your own underwater or coastal base.

Hunt for rare resources.

Fish and develop aquatic resources.

Fight bosses and dangerous creatures.

Experiment with Changed transformations.

Develop technology and magic.

Search for secrets hidden beneath the ocean.

Or simply try to survive.

👥 Multiplayer

The pack is designed for cooperative survival as well.

Explore the ocean with friends, build a shared base, search for structures, and split up to cover more territory.

Recommended RAM

8–12 GB RAM

Main Mods

The pack contains a large selection of mods, including:

Changed
Changed Addon
Changed Siren Course
Changed Survive Protocol
Alex's Caves
Alex's Mobs
Aquaculture
Aquamirae
Deeper Oceans
Upgrade Aquatic
Dungeons Arise: Seven Seas
Botania
Modern Industrialization
Farmer's Delight
L_Ender's Cataclysm
Ancient Villages
Underwater Village
Big Lost Cities
Sophisticated Backpacks
Immersive Weathering
Sound Physics Remastered
Embeddium
Oculus
Xaero's Minimap
Xaero's World Map
JEI
FTB Ultimine
Simple Voice Chat

…and many more.

⚠️ Important

This modpack contains content from the Changed universe, horror elements, hostile creatures, transformations, and other potentially disturbing content.

It is recommended to create a new world when installing the modpack or making significant changes to the mod list, especially because of the extensive world-generation modifications.

🌊 The Ocean Is Waiting

You came here to explore.

Maybe you'll find a forgotten village.

Maybe you'll find something valuable.

Maybe you'll find a way to survive.

Or maybe...

something will find you first.

Welcome to Changed Siren Course.