
September 2, 2025
Structures Add-On
Build, explore, and upgrade with the Structures Add-On featuring over 7 unique themes and a vast variety of structures to discover. Each theme, like the Runesmith, Summoner, or Technician brings biome-specific buildings, custom loot, and powerful new crafting devices. Upgrade your gear, unlock special gameplay mechanics, and combine the themes for endless progression and exploration.
Themes
This Add-On bundles 7 unique themes into one experience, each offering its own structures, items, and gameplay mechanics.
Every theme can be found in a host of abandoned buildings, some left behind with a special crafting device still working (like the Witch’s Cauldron or the Runesmith’s Forge) that grants access to powerful items and upgrades. Explore each theme thoroughly and discover the links and connections between them to use all of them to their full potential.

Steam Alchemist
The lost art of Alchemism opens up many ways of transmuting items into one another and creating new and useful substances. Find or construct your own Steam Altar by exploring its abandoned towers, and learn to re-shape the world around you with Transmutation Powder.

Herbalist
The lost art of flower crossing can be uncovered in the abandoned windmills and greenhouses of the Herbalist. Make your own Rice Paddies to grow Rice on with the help of the Trowel, or find a Flora Planter that can create new flowers by crossbreeding them into new species. Be aware that, while equally pretty, not all of them are purely decorative.

Fisher
Oceans and beaches bear the ruins of long-abandoned fisher huts and their old ways of fishing. Learn how to build Fish Traps that catch fish automatically, and with the help of the Herbalist’s Rice, chop them into some tasty Sushi.

Runesmith
The Runesmiths of a forgotten time were able to build impressive Arcane Forges that can work even Netherite Gear into an arcane equivalent upgrade. Though Arcane Netherite isn’t all that much better by itself, it can be grafted with special Runes that grant it powerful abilities.

Summoner
Surrounded by imposing, sinister altars stand the Eldritch Spawners, used by an ancient Summoner who could manipulate souls to spawn evil into the world. By crafting Mob Catalyst and harvesting souls from fallen mobs, you can revive the Eldritch Spawners and use them for yourself.

Technician
The old world was also host to a genius technician who, while not quite as ambitious as their colleagues, held a definite passion for all things explosive. With the help of their Blast Powder, you can craft both small and large cannons, as well as dynamite sticks, which may or may not work well with some Transmutation Powder.

Witch
With the elder Witch’s knowledge, recipes of forgotten potions reveal themselves to you. Brew them at her finest creation, the Witch’s Cauldron. Unlike a brewing stand, it can use more than just Nether Warts for its base, allowing for many effects that were previously difficult to brew to be made into potions. Though perhaps most importantly, its structure allows for other ingredients to be dipped into the brew, giving access to many infusion recipes, like the Arcane Runes, special Hex-flowers, or some especially tasty Sushi.

Here are some examples of structures that spawned in our worlds, giving you a taste of what you can discover in-game.













