Colossus: A World Generation Overhaul

Take Minecraft's world generation to new heights!

Explore a massively expanded Overworld with enormous mountain ranges, vast flat plains, rolling hills, smooth fells, volcanic zones, deep ocean trenches and rich high-altitude ores. With peaks reaching approximately 1,800 blocks tall and a build limit of Y=2015, the world is bigger than ever before.

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Features

Regions

The world is split into huge regions, thousands of blocks across:

• Flat lands: wide, very flat plains that are great for building.
• Hilly lands: rolling hills that surround the mountains.
• Mountain ranges: roughly 1 in 10 hilly areas rise into enormous, jagged ranges up to ~1,800 blocks tall.
• Fells: smooth, rounded mountains that peak around Y=400, inspired by the fells of Lapland.

Massive Mountains

• Mountains reach heights of approximately 1,800 blocks.
• Only cold biomes generate above Y=450, so snowy peaks crown every range.
• Mud tracks wind across the lower mountain slopes.
• Mountain streams run down the cliff faces.

Expanded World Generation

• Continents and biomes are approximately 4 times larger.
• Inspired by Minecraft's Large Biomes world type.
• Deep ocean trenches cut into the sea floor, dropping to about 20 blocks above bedrock.
• Thin lines of andesite run across land and sea floor for hundreds of blocks, marking where continents once collided. The trenches follow the same lines.

Mountain Ores

Above Y=260, rare ores get steadily more common the higher you climb:

• Diamonds (exposed at the very top), iron, gold, emeralds and lapis lazuli.
• Cave ores below Y=260 are untouched, so your usual diamonds are still there.
• Lapis also generates more often in mountain biomes.

Volcanic Mountains

Some mountains are volcanically active:

• Lava pools rimmed with blackstone, plus scorched basalt and magma ground.
• The new sulfur springs and sulfur pools.
• Veins of exposed diamonds scattered around the volcano.

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Compatibility

• This pack replaces the Overworld's terrain and the Overworld biome files, so it will conflict with other datapacks or mods that change biomes (including Terralith). Use it on its own.

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Installation

Available as a mod or as a datapack.

Mod: drop the jar into your mods folder.

Datapack:

1. Download the ZIP file.
2. Create a new Minecraft world.
3. Open More → Data Packs.
4. Add the downloaded datapack.
5. Create your world and start exploring!

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Recommended Seed

Seed: 4575181906784291229

To find mountain biomes in-game, use:

/locate biome minecraft:jagged_peaks

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Important Notes

• New Worlds Only: Existing chunks will keep their original terrain.
• Overworld Replacement: This pack replaces vanilla Overworld generation and may conflict with other terrain-changing packs.
• Performance: Chunk generation can be slower due to the increased world height. A lower render distance is recommended.
• Distant Terrain: Voxy is recommended. Distant Horizons also works for viewing the huge mountains from far away.

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Information

Detail	Value
Minecraft Version	26.3
Build Limit	Y=2015
Mountain Height	~1,800 blocks
Fell Height	~400 blocks
Terrain Scale	~4× larger
Required Mods	None
Dimension	Overworld

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Explore a Bigger World!

Climb towering mountains, wander smooth fells, find volcanic peaks and dive into the deep trenches.

The Overworld has never been this massive.