William Wythers' Overhauled Overworld
by WilliamWythers
A massive biome overhaul adding over 200 new biomes with detailed terrain features, custom trees, and improved vanilla landscapes.








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A massive biome overhaul adding over 200 new biomes with detailed terrain features, custom trees, and improved vanilla landscapes. William Wythers' Overhauled Overworld lists custom tree generation among its features. WilliamWythers files William Wythers' Overhauled Overworld under World Generation. It is built for players who want a colourful biome and terrain overhaul with a vanilla soul. It rates beginner to pick up.
Often shortened to WWOO, it reworks Overworld biomes and generation to feel richer while staying close to the base game's spirit. William Wythers' Overhauled Overworld counts 5 features across 15 versions. It brings improved mountain and river terrain. It needs no companion mod. It belongs on both sides.
WilliamWythers hands out William Wythers' Overhauled Overworld from his own page. It includes compatible with structure mods. 8 other World Generation mods sit beside William Wythers' Overhauled Overworld. It ships under CC BY-NC. 1,293 people watch William Wythers' Overhauled Overworld for updates.
WilliamWythers tags William Wythers' Overhauled Overworld as biomes, overhaul and terrain. It spans 1.20.1 to 26.1.2. It brings enhanced vanilla biome variants. WilliamWythers keeps the William Wythers' Overhauled Overworld code to himself. It is rated beginner to learn.
26.1.2 is the newest game version WilliamWythers has signed off for William Wythers' Overhauled Overworld, and 1 release has landed since. It counts 5 features across 15 versions. It lists improved mountain and river terrain among its features. It includes custom tree generation. Biomes O' Plenty sits next to William Wythers' Overhauled Overworld under World Generation here.
Mod Loaders
William Wythers' Overhauled Overworld ships a separate build for each of Forge, Fabric and NeoForge. It needs one loader, William Wythers' Overhauled Overworld ignores the other. It lists custom tree generation among its features. 55 other mods here carry William Wythers' Overhauled Overworld's loader list.
Minecraft Versions
15 game versions carry William Wythers' Overhauled Overworld, 1.20.1 at the oldest and 26.1.2 at the newest. A William Wythers' Overhauled Overworld jar built for another version will not load William Wythers' Overhauled Overworld. It reaches further than 116 mods here. WilliamWythers signed William Wythers' Overhauled Overworld off for 26.1.2, 1 release before 26.2.
1.21.10, 1.21.11 and 26.1.2 are the newest game versions with a William Wythers' Overhauled Overworld build. Your launcher version and the William Wythers' Overhauled Overworld jar version have to match. 1.20.1 and 1.20.2 are the oldest William Wythers' Overhauled Overworld builds, below 1.20.1 there is none. Each number exists per loader, so 45 William Wythers' Overhauled Overworld combinations in all.
William Wythers' Overhauled Overworld compared
William Wythers' Overhauled Overworld is weighed against 3 other mods here. Each comparison puts the loaders, the game versions and what they need beside each other, without picking a winner.
Release history
WilliamWythers has published 29 William Wythers' Overhauled Overworld builds, the first on 2023-10-08 and the newest on 2026-07-16. The date says when William Wythers' Overhauled Overworld last moved, not how long it will keep working. 16 William Wythers' Overhauled Overworld builds went out in 2026. 27 of them are full releases, the rest are test builds of William Wythers' Overhauled Overworld.
| Build | Published | For | Downloads |
|---|---|---|---|
| 2.7.0beta | 2026-07-16 | NeoForge · 26.1.2 | 927 · 8.5 MB |
| 2.7.0beta | 2026-07-16 | Fabric, Quilt · 26.1.2 | 5K · 8.5 MB |
| 2.6.7 | 2026-05-28 | NeoForge · 1.21.1 | 106K · 5.5 MB |
| 2.6.7 | 2026-05-28 | Fabric, Quilt · 1.21.1 | 17K · 5.5 MB |
| 2.6.6 | 2026-05-23 | NeoForge · 1.21.1 | 4K · 8.1 MB |
| 2.6.6 | 2026-05-23 | Fabric, Quilt · 1.21.1 | 891 · 8.1 MB |
| 2.6.5 | 2026-05-22 | Fabric · 1.21.1 | 313 · 9.4 MB |
| 2.6.5 | 2026-05-22 | NeoForge · 1.21.1 | 606 · 9.4 MB |
2026: 16 builds · 2025: 6 builds · 2024: 5 builds · 2023: 2 builds
Key Features
William Wythers' Overhauled Overworld brings a focused set of features to the table. Highlights include 200+ new biomes, plus enhanced vanilla biome variants, with the full list below.
- 200+ new biomes
- Enhanced vanilla biome variants
- Custom tree generation
- Improved mountain and river terrain
- Compatible with structure mods
Tags
How to install William Wythers' Overhauled Overworld
William Wythers' Overhauled Overworld takes one of Forge, Fabric and NeoForge. It spans 1.20.1 to 26.1.2. It belongs on both sides. Nothing else goes in with William Wythers' Overhauled Overworld.
- 1Install Forge for the Minecraft version you want William Wythers' Overhauled Overworld on. It brings enhanced vanilla biome variants. A profile on another version never starts William Wythers' Overhauled Overworld. It counts 5 features across 15 versions.
- 2Nothing has to go in before William Wythers' Overhauled Overworld. The William Wythers' Overhauled Overworld page names its own requirements. No library is listed under William Wythers' Overhauled Overworld. It includes custom tree generation.
- 3Drop the William Wythers' Overhauled Overworld jar into the mods folder. The folder may hold other mods beside William Wythers' Overhauled Overworld. The jar goes in whole, William Wythers' Overhauled Overworld unpacks nothing. One William Wythers' Overhauled Overworld file, nothing to unpack.
- 4Start the game and look for William Wythers' Overhauled Overworld in the mods list. No William Wythers' Overhauled Overworld entry means the loader or the version is off. It loads on its own once the version matches. The log names the file when William Wythers' Overhauled Overworld refuses.
William Wythers' Overhauled Overworld runs on 15 game versions, 1.20.1 to 26.1.2. It lists 15 game versions. 1.20.1 is as far back as William Wythers' Overhauled Overworld goes. Each William Wythers' Overhauled Overworld jar is built per version.
See our full mod install guideCompatibility & alternatives
Forge, Fabric and NeoForge run William Wythers' Overhauled Overworld today. It includes enhanced vanilla biome variants. 15 versions carry William Wythers' Overhauled Overworld. It stops at 26.1.2. It shares World Generation with 8 others.
natures-compass sit well next to William Wythers' Overhauled Overworld. It counts 5 features across 15 versions. Terralith and Biomes O' Plenty cover ground William Wythers' Overhauled Overworld also covers. No shared library ties William Wythers' Overhauled Overworld down. It competes in World Generation.
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