Archean Patch Notes — April 1, 2026
Aggregated from Steam, cross-tracked with Battle.net coverage on GamePatchNote.
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.
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/Admin: Added 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 IDE: Added missing Zoom shortcuts in Editor Shortcuts menu
Computer/HUD: Added multi-line support in print() using n
Bug Fixes
Avatar: Fixed style resetting when toggling flashlight during editing
Avatar: Fixed color picker preview not matching actual rendered colors (gamma correction)
Avatar: Fixed Crafting window remaining visible when Backpack is collapsed
Build: Fixed missing SHIFT keybind documentation in Strut/Triangle tooltips
Build: Fixed floating flexible cables after deleting builds
Build: Fixed mesh/strut tool snapping to vertices behind the aimed surface
Blueprint: Fixed cable ports remaining permanently blocked after deleting cross-build flexible cables from spawned blueprints
DashboardTool: Fixed edge snap (SHIFT) not working on triangle panels
NavInstrument: Fixed speed values shown in scientific notation in info panel
Launcher: Fixed 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)
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