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Archean
Steam News 1 April 20261mo ago

The Symmetry & Multiplayer Update

The Symmetry & Multiplayer Update This update adds symmetry for components and pipes, peer-to-peer multiplayer without port forwarding, and in-game documentation. Component & Pipe Symmetry The symmetry system now works…

Update log

Full Archean update

The complete published notes, normalized for clean reading and source attribution.

Extracted changes

13 fixes7 additions4 changes0 removals
  • Gameplay
  • Workshop
  • Store
  • UI and audio
  • Fixes
addedThe Symmetry & Multiplayer UpdateThis update adds symmetry for components and pipes, peer-to-peer multiplayer without port forwarding, and in-game documentation.
addedSteam P2P MultiplayerYou can now play with your friends without forwarding any ports or configuring your router. Friends see a "Join Game" button in their Steam friends list when you're hosting. A new Friends tab in the multiplayer menu lists all friends currently hosting with a direct Join button.
changedIn-Game DocumentationPress H (rebindable) to open the built-in documentation browser. Covers all components, tools, game mechanics, XenonCode ...
addedIn-Game DocumentationContext-sensitive: press H while hovering an inventory item or aiming at an entity to open its specific page. Inventory items also have new tooltips showing their wiki description and property badges (Symmetry, Airtight). Available in 7 languages (EN, FR, DE, ES, IT, RU, ZH).
addedXenonCode: Vectors & MatricesNew types: vec2, vec3, vec4 vectors and mat2, mat3, mat4 matrices (plus non-square variants like mat2x3). Built-in functions: dot, cross, normalize, length, distance, angle, lerp for vectors; inverse, transpose, determinant, identity for matrices. Supports swizzling (e.g. myVec.xz, myVec.zyx).
changedSteam Workshop for Scripts & HUDsXenonCode scripts and custom HUDs can now be published to and installed from the Steam Workshop.

The Symmetry & Multiplayer Update

This update adds symmetry for components and pipes, peer-to-peer multiplayer without port forwarding, and in-game documentation.

Component & Pipe Symmetry

The symmetry system now works with components and pipes, not just blocks. Place a component on one side and its mirror copy appears on the other, with correct orientation. Pipes are also mirrored automatically between matching ports. Deletion and painting follow the same symmetry. Uses 2x resources when mirroring.

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Steam P2P Multiplayer

You can now play with your friends without forwarding any ports or configuring your router. Friends see a "Join Game" button in their Steam friends list when you're hosting. A new Friends tab in the multiplayer menu lists all friends currently hosting with a direct Join button.

In-Game Documentation

Press H (rebindable) to open the built-in documentation browser. Covers all components, tools, game mechanics, XenonCode ...

Context-sensitive: press H while hovering an inventory item or aiming at an entity to open its specific page. Inventory items also have new tooltips showing their wiki description and property badges (Symmetry, Airtight). Available in 7 languages (EN, FR, DE, ES, IT, RU, ZH).

XenonCode: Vectors & Matrices

New types: vec2, vec3, vec4 vectors and mat2, mat3, mat4 matrices (plus non-square variants like mat2x3). Built-in functions: dot, cross, normalize, length, distance, angle, lerp for vectors; inverse, transpose, determinant, identity for matrices. Supports swizzling (e.g. myVec.xz, myVec.zyx).

Steam Workshop for Scripts & HUDs

XenonCode scripts and custom HUDs can now be published to and installed from the Steam Workshop.

Other Changes

  • Creative/AdminAdded fly speed control with Page Up / Page Down, from x1 to x4 multiplier

  • Build: Mesh tool now displays thickness direction arrow on aimed triangles

  • XenonCode IDEAdded missing Zoom shortcuts in Editor Shortcuts menu
  • Computer/HUDAdded multi-line support in print() using n

Bug Fixes

  • AvatarFixed style resetting when toggling flashlight during editing
  • AvatarFixed color picker preview not matching actual rendered colors (gamma correction)
  • AvatarFixed Crafting window remaining visible when Backpack is collapsed
  • BuildFixed missing SHIFT keybind documentation in Strut/Triangle tooltips
  • BuildFixed floating flexible cables after deleting builds
  • BuildFixed mesh/strut tool snapping to vertices behind the aimed surface
  • BlueprintFixed cable ports remaining permanently blocked after deleting cross-build flexible cables from spawned blueprints
  • DashboardToolFixed edge snap (SHIFT) not working on triangle panels
  • NavInstrumentFixed speed values shown in scientific notation in info panel
  • LauncherFixed solo game startup being slowed down by checking all subscribed Workshop mods instead of only the ones used by the world

  • Fixed desync of component position on subgrids attached to joints

  • Fixed Magic Cube "Ignore Environment" not ignoring gravity

  • Fixed some UI elements remaining visible when toggling UI off (F3)

[dynamiclink href="https://store.steampowered.com/app/2941660/Archean/"]

Source

Steam News / 1 April 2026

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