Create items, creatures, buildings, and new worlds

Install and enable mods

1. Subscribe to a mod on Steam Workshop and wait for Steam to finish downloading it.
2. Open Mods → Installed Mods in the game. Use Enable if the pack is disabled.
3. Enabled Workshop packs load automatically in single-player when ready. If a pack stays Pending, use Load Now or restart the game.

Some mods need a restart. Load Now is unavailable in multiplayer; install and enable matching mods before joining friends. See troubleshooting if a pack or item is missing.

Make your first mod

Many mods can be made just by editing text files. The Windows version includes Mod Prep: open Mods → Create / Edit Mods, or run Tools/Mod Prep.bat next to the game.

It creates the basic files, checks for common mistakes, installs a copy for testing, and prepares the finished mod for Steam Workshop. You make the final Workshop upload from the Mods menu inside the game.

Start with the first-mod walkthrough to create, check, and test a single item.

Items, creatures, and new worlds

A mod can add items, creatures, buildings, recipes, and more. Mods can also add new world types with their own terrain, creatures, sky, gravity, starting point, size, and other options.

The mod files and folders guide covers how packs are arranged. Lua scripting is supported for many parts of the game as well: use the Lua programming reference and Lua safety guide if you want a new item or creature to do something unusual.