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HARWELL: Mars IndustriesNewsv0.18: Multiplayer!
In-game event

v0.18: Multiplayer!

HARWELL: Mars Industries · published 2 Feb 2026, 22:55 UTC · build 21754319

All newsPlayers around this dateRead on Steam

New Features

  • Added Sulfur and Uranium map textures ready for implementation

  • Added Sulfur, Concrete, Explosives, and Soil icon graphics

  • Redesigned admin menu/pause menu and moved them from the bottom right (now bound to Escape key)

  • Redesigned lobby screen with rearranged game settings

  • Replaced static parallax background stars with dynamic twinkling shader

  • Restructured AI behaviour system to be fully moddable

  • Added new particle effects (currently unused)

  • Added buttons to debug menu for changing player names

  • AI names are now moddable via /data/names_ai.json

  • Added AI name category selection to lobby settings

  • Implemented the basics of a sabotage system (sabotage_card, sabotage_effect, and sabotage_manager)

  • Added sabotage effects to data folder with modding guide

  • Added Sentry integration

  • Added Nakama integration

  • Added main menu profile display showing player IDs and information

  • Added PostHog analytics integration with event tracking

  • Created account setup process for Steam integration with hashed recovery keys

  • Added more lobby details including match ID and checksum

  • Added a bind to F1 that hides all of the UI

  • Added dividends column to the stock menu

  • Added an overlay that colours buildings based on the player that owns them - Made it default

Improvements

  • Optimized buildings by implementing shared and cached data between structures

  • Optimized building audio system

  • Balanced market and building input/output values

  • Replaced remaining texture buttons throughout the game

  • Redesigned AI behaviour to better construct buildings and account for building modifiers

  • Rebalanced goods and building production

  • Made price changes instant

  • Redesigned lobby screen and server list screen

  • Restructured multiplayer_manager and split into separate sync agents (world_sync_agent, building_sync_agent, nakama_sync_agent, steam_sync_agent, init_sync_agent, player_sync_agent), which each manage data synchronisation between players for their respective focus.

  • Improved all player references - replaced Steam ID and unique ID with peer ID for consistency and same-device functionality

  • Improved Nakama multiplayer implementation for better robustness

  • Improved Nakama integration with in-game UI elements

  • Implemented proper Steam ID storage and device ID linking

  • Updated server address and information with new Nakama server

  • Redesigned lobby screens for better fit and readability

  • Redesigned AI slider logic to properly recreate AI

  • Cleaned up old test scripts

  • Added missing localisation

Bug Fixes

  • Fixed building audio becoming additive and increasingly louder over time

  • Fixed multiplayer data sync issue that caused memory crashes

  • General multiplayer stability fixes

  • Fixed bug where building construction audio would start and stop repeatedly

  • Fixed broken building placement sound effect

  • Fixed particle effects displaying incorrectly

  • Fixed host player not syncing inventory and financial data properly

  • Fixed issues with game creation and hosting

  • Fixed Steam integration issues while maintaining Steam friends functionality

  • Fixed AI slider not updating AI in lobby when switching between lobby types

  • Audio bugfixes

  • Fixed an issue where stock would appear purchased as the wrong player.

More from HARWELL: Mars Industries

Other announcements

All news
Community8 Jul 2026Dev Diary #1 - The Building BlocksHello, Pioneers, and welcome to the first Harwell: Mars Industries dev diary. If you're new here, hello! I’m Caleb Houlding, solo developer of Harwell: Mars Industries, along with publisher Aquila Interactive. It's great to have you here! Today we’re looking at the building blocks of Harwell: Mars Industries, and we'll be showcasing the implementation of various buildings, along with their reso…Community28 Apr 2026New Publisher Announcement!Mars is open for business! Developer Caleb Houlding is partnering with publisher Aquila Interactive to announce Harwell: Mars Industries , a sci-fi economic strategy game set on Mars, coming 2027. This is the start of an exciting journey, and we'd love for you to head to the Store page, wishlist and come along with us for the ride in our Discord . What is Harwell: Mars Industries Each corporati…Game update13 Apr 2026v0.20.4 PatchNew Features · Friends system with Steam and Nakama integration — add friends, see their status (online, in-game, in-lobby), and invite them directly to games. · Beautiful Shadows toggle in Graphics settings for the new lighting pipeline. · Game end screen redesign with full-screen overlay, financial graphs (revenue, expenses, company value, profit, debt), per-resource production tables, and co…