Steam News12 June 202624d ago

Take to the seas and battle the Fathom – the Leviathan Update Playtest is live!

Greetings Calyx players! We're excited to invite you to take an early look at our upcoming Leviathan Update, including a new ocean biome, the Comet and Broadside fighting ships, the Ark naval transport, and the new Fath

In this update7

Full notes

Full Calyx update

Read the full published notes in a cleaner layout. The original post stays linked below.

What changed

0 fixes3 additions4 changes0 removals

Maps
Gameplay
Workshop
UI and audio

addedGreetings Calyx players!We're excited to invite you to take an early look at our upcoming Leviathan Update, including a new ocean biome, the Comet and Broadside fighting ships, the Ark naval transport, and the new Fathom species of Calyx.

changedNew ocean-based mapsSteam post image4 challenge maps which will form part of the next chapter of the Calyx campaign. The maps are in a newly-discovered region where an ocean has formed.

changedNaval units and buildingsSteam post imageBuild the Shipyard, and manufacture the Comet gunship, the Broadside battleship and the Ark transporter.

changedNaval units and buildingsSteam post imageConstruct the Naval Workshop and upgrade your fleet’s capabilities.

addedThe Fathom CalyxSteam post imageA new species of Calyx that inhabits the ocean, the Fathom grows in a mesh that obstructs the progress of your ships. It grows two kinds of node, a ranged one similar to the Tormentor, and a node that spawns a new species of marine crawlers.

changedHow do I access the playtest version?If you want to request access for the first time, visit the Calyx Steam Page , scroll down and hit the “Request Access” button. You should then see the Calyx Playtest item in your Steam library.

Calyx changes

addedWe're excited to invite you to take an early look at our upcoming Leviathan Update, including a new ocean biome, the Comet and Broadside fighting ships, the Ark naval transport, and the new Fathom species of Calyx.

changedSteam post image4 challenge maps which will form part of the next chapter of the Calyx campaign. The maps are in a newly-discovered region where an ocean has formed.

changedSteam post imageBuild the Shipyard, and manufacture the Comet gunship, the Broadside battleship and the Ark transporter.

changedSteam post imageConstruct the Naval Workshop and upgrade your fleet’s capabilities.

addedSteam post imageA new species of Calyx that inhabits the ocean, the Fathom grows in a mesh that obstructs the progress of your ships. It grows two kinds of node, a ranged one similar to the Tormentor, and a node that spawns a new species of marine crawlers.

Greetings Calyx players!

We're excited to invite you to take an early look at our upcoming Leviathan Update, including a new ocean biome, the Comet and Broadside fighting ships, the Ark naval transport, and the new Fathom species of Calyx.

What's in this playtest?

New ocean-based maps

Steam post image4 challenge maps which will form part of the next chapter of the Calyx campaign. The maps are in a newly-discovered region where an ocean has formed.

Naval units and buildings

Steam post imageBuild the Shipyard, and manufacture the Comet gunship, the Broadside battleship and the Ark transporter.

Steam post imageConstruct the Naval Workshop and upgrade your fleet’s capabilities.

The Fathom Calyx

Steam post imageA new species of Calyx that inhabits the ocean, the Fathom grows in a mesh that obstructs the progress of your ships. It grows two kinds of node, a ranged one similar to the Tormentor, and a node that spawns a new species of marine crawlers.

How do I access the playtest version?

If you took part in a previous Calyx playtest, you should now see "Calyx Playtest" in your Steam library once again.

If you want to request access for the first time, visit the Calyx Steam Page, scroll down and hit the “Request Access” button. You should then see the Calyx Playtest item in your Steam library.

Help the devs – fill out the survey

It would be super helpful if you could fill out the playtest survey to let us know your feedback. There's a link to the survey on the Main Menu of the playtest version of the game.

We can’t wait to hear what you think of the new features.

Thanks for your support!

John, Mark & Phil, Studio 568 Ltd 🙂

Source

Steam News / 12 June 2026

Open original post

Changelog.gg summarizes and formats this update. How we read updates.