Source-checkedTechnology & automation

Halcyon | Data & Essence

by EsetKalenko · for Minecraft

A story of reconciliation, told through a magitech mod about exploration and factory-building.

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2 mo agoLast updated
LicenseRef-Halcyon-LicenseLicense
NeoForgeLoaders

About Halcyon | Data & Essence

From Modrinth

A story of reconciliation, told through a magitech mod about exploration and factory-building.

Black silhouette of a tall spire on a gradiented background that is blue at the top, purple at the middle, and orange at the bottom; four symbols connected in a constellation are overlaid - from bottom to top they are a purple hammer, a yellow crescent moon, a green mushroom, and a cold white star.

Halcyon

-what is this song that drives me?-

To beget change, one must consider first the nature of its recipient. This is easily done: evidence of a scarred past is all around, clinging to the world like detritus in water that needs but a single motion to stir to the surface. A tablet rests high in snow-capped dark cradled by a feathered hand. The past is opening itself to you. It just takes one step, one fleeting motion to behold. Will you do it?

The road onto which you will embark stretches high and low, twisting through other realms alien and familiar. The ascent will be vast, but so too will be its spoils. The further you go, the more you must bear in mind your goal. To beget change, one must ultimately embody its agent.

This is Halcyon, a story of reconciliation told through your discoveries and experiments surrounding once-forgotten magitech machinery and its architects. Through artifice, grow familiar with the ebbs and flows of the Tides. Unearth a lost history, and realize it was not lost at all. Explore, construct, make contact, learn. And at the end of all things, when the lights in the sky are dim and clouded in mist and the tablet in your hands reflects that which you always knew to be real, you will make your role clear, and bear witness to your endeavor's conclusion.

Reconcile.

Screenshot of a selection of fanciful copper machinery placed in a dark room built from variants of polished obsidian blocks; the machines are interconnected with glowing wires.

Alpha Notice

Halcyon is in alpha. What that means is twofold. First, that it is not a complete experience: you can currently progress up to the beginning of the Third Tier. That can take but a few hours if one knows what they're doing, certainly more if not. Second, that along the way, content may be changed drastically. Back up your world before any updates, and do not expect major updates to work well without a new one. But when all is said and done, Halcyon is planned to have many tens of hours of content.

Features

-what are its instruments, its voices?-

  • Many machines both familiar and fresh; the heart of a magitech factory
  • Logistics with which to move around your factory's spoils
  • Several useful tools and other creations of artifice
  • Multiple world-traversal items, including a grappling hook
  • A scarred past, an expansive history for you to explore
  • A changing world whose hidden truths surface as you listen to its stories
  • Multiple sets of thematic building blocks: obsidian, copper, and more
  • New structures in which your precious knowledge is sealed away
  • Data-driven progression system focused on puzzle-solving and exploration
  • The Song of the Factory, an ever-growing musical monument to your endeavors
  • And more

Mod Integration

-does it resonate to me, and me alone?-

  • Applied Energistics 2:
  • Process AE2's materials with Tide-driven machinery
  • EMI:
  • Full recipe display support, with thematic visuals and progression-based recipe hiding
  • Malum:
  • Ability to locate a certain... thing with the Resonance Receptor
  • New ways to process the spoils of your Wicked Harvests
  • Mekanism:
  • A new set of Nodes and Wires for transferring Chemicals
  • Opalescence:
  • Opal variants of Traversite Road blocks
  • Oritech:
  • Recipes to make Oritech alloys in the Synthesis Chamber for half the cost
  • Pastel:
  • New ways to process the materials of your Artistry
  • Some Pastel items can serve as powerful sources of Tidal Energy
  • More interop will be added as both mods flourish further!
  • Primal Magick:
  • Ability to locate the Shrines a mage requires with the Resonance Receptor
  • Refined Storage:
  • The Tides beget more efficient methods to create your base RS components
  • Tempad:
  • While there is no Tempad integration in Halcyon itself, we recommend the addon _Tides of Time_, made by a close friend of the project. It fully subsumes Tempad into Halcyon's progression, including a new structure and changed recipes.
Screenshot of the interior of a Nature Outpost structure; it is built from a purple rock and is visibly overgrown, with leaves and moss everywhere.

Credits

-who composed the song, this distant dream?-

Primary developers

  • Esét Kalenko: Lead Art/Narrative Designer - Esét's KoFi
  • Fuzzy: Lead Composer

Contributors

  • Cimdy: Former programming lead, shader sorceress, lots of background lore
  • DavidRarria09: Additional music
  • K King: Sound designer - K King's KoFi
  • Multyfora: Programming, render wizardry
  • Qther/Vonr: Performance improvements
  • TheRobbie73: Sable compatibility

Translators

  • Chinese: ChujikYahus, dovisutu, ZetaY

Highlights

From source data

Game versions

Supports 2 Minecraft versions, the newest being 1.21.1.

Loaders

Runs on NeoForge.

Footprint

Rated a light load on a server.

Halcyon | Data & Essence on Nxeon

From our catalogue
One-click install
Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
Server side
Required on the server
Server type needed
NeoForge
Server load
light
Smallest plan we suggest
Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
Latest build
0.4.3+aria-of-the-moon (alpha), released 2026-08-22

Game versions by loader

LoaderGame versionsNewest
NeoForge1.21.11.21.1

From 5 recorded builds of Halcyon | Data & Essence.

Recent builds

BuildReleasedGame versionsLoaders
0.4.3+aria-of-the-moon alpha2026-08-221.21.1NeoForge
0.4.2+aria-of-the-moon alpha2026-08-111.21.1NeoForge
0.4.1+aria-of-the-moon alpha2026-08-041.21.1NeoForge
0.3.6+tides-of-phenua alpha2026-05-081.21.1NeoForge
0.3.5+tides-of-phenua alpha2026-05-071.21.1NeoForge

Dependencies

  • Required: modrinth project 2Ct0NAxj (modrinth, not in our catalogue)
  • Optional: modrinth project fRiHVvU7 (modrinth, not in our catalogue)

Declared by the newest build that lists any. Required ones are installed with it on one-click installs.

Run Halcyon | Data & Essence on a Minecraft server

Pick a server or deploy a new one above; it is installed in one click.

What kind of mod it is

From the catalog
Listed on Modrinth as “Mods”

Technology & automation

Machines, power, logistics and automation.

Runs on your server

From source side support

Modrinth lists Halcyon | Data & Essence as required on the server. Check its Modrinth page to see whether players need it too.

Compatibility

Game
Minecraft
Loaders
NeoForge
Runs on
Serverrequired on the server
Game versions
1.21.1 and 1 earlier

Verified at the source

  • ✓ModrinthOfficial listing, checked 2026-10-02Open ↗
  • ✓AuthorEsetKalenko, as published on Modrinth
  • ✓LicenseLicenseRef-Halcyon-LicenseFree

Halcyon | Data & Essence, answered

Generated from the mod’s own source data.

Do my players need to install Halcyon | Data & Essence?

Modrinth lists Halcyon | Data & Essence as required on the server. Check its Modrinth page to see whether players need it too.

Which loaders does it support?

NeoForge.

Is it free?

Yes. Halcyon | Data & Essence is free to download from Modrinth. Its license is LicenseRef-Halcyon-License.

How do I add it to my Nxeon server?

Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

NxLabs

Run Halcyon | Data & Essence on a Minecraft server.

Deploy in about a minute from $4.99 a month, then add Halcyon | Data & Essence in one click.