Mod it. Map it. Play it.

Mod it. Map it. Play it.

Melange is an open-source modding framework for Worms Ultimate Mayhem.

Multiplayer fixes, a plugin store, a map editor, replays and a web panel, all loaded by one drop-in ASI.

Download Melange

Download Melange 0.9.1melange-0.9.1.zip · Windows

Latest9.1 MBReleased 10 Oct 2026Steam build #1077

SHA-256

a8a28c68972123f2e7a121e77dde57c8335b7fcd186239dc2767e359ce2f5d0b

Needs the Steam release of the game, build #1077. Signed; see Code signing.

• Install guide
• Release notes
• All releases
• Verify the hash

What's inside

• Thumpermod loader
• Spiceplugin manifest
• Ergmap editor
• Wormsignreplays
• Oasisweb panel
• Miragegraphics
• Sieveasset extractor
• Caravanmap importer

What it does

Online play

Multiplayer fixes

Fixes for freezes, desyncs, "This session is no longer available" and crashes in online play. Each fix runs on your own machine and needs nothing from the other players.

DocsWhat gets fixed

Thumper

Mods and the Store

Weapons, effects, shaders, scripts and tools. Open the Store from Melange.exe or the game, pick a plugin, press Install, and switch it off again any time.

DocsInstall a mod

Mirage

Graphics tools

Borderless fullscreen, supersampling, sharper textures, shadows, post-processing effects and shader mods, with a GL capture for debugging.

DocsGraphics layer

For modders

Write a plugin in Lua or C++, describe it in a manifest, and publish it to the Store.

• Creating a pluginLua mods, presets, C++ modules
• Lua APIevery wum.* function
• Spice manifestspice.json, field by field
• Ergbuild and patch maps

The launcher

Melange.exe installs and updates Melange, turns plugins on and off, and starts the game.