80%Excellent matchOffworld Trading Company
77%4k77% positive reviews, Mostly Positive across 4k reviews·Replay Value · Atmospheric
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There are no safe spaces in Harwell. Compete for resources, manipulate the Mars Trade Committee, and outbid rivals in a player-driven economy. Use diplomacy – or sabotage and the black market – to disrupt opponents. Control the rules, control the market, eliminate the competition.
HARWELL: Mars Industries
SteamMars is open for business.
Every corporation begins on an equal footing in Harwell, a singleplayer and multiplayer economic strategy game set on the Red Planet. Build your company, control production, and trade in a dynamic, player-driven economy where shifting supply and demand can lead to vast riches – or drive you into bankruptcy.
The goal is simple: Accumulate wealth, outmaneuver your rivals, and buy out every competitor to establish a total monopoly.
Establish the foundation of your company through mining and manufacturing.
Efficient production is the backbone of profitability – manage your resources, streamline your industry, and maximize output.

The market in Harwell is not static, it is shaped by every player’s decisions.
Every transaction matters. Every decision affects the market.
Success depends on understanding timing, opportunity, and economic pressure.

Each corporation operates with its own financial system.
Outproduce your rivals – or buy them out and take everything they built. The choice is yours.

Direct interaction between players is key for success.
Victory comes not only from growth, but from how you interact with those around you.

No two corporations play the same way.
Your company becomes your identity – and your strategy defines your success.
Harwell is designed to grow with its players.
Your strategies – and your creations – can help define the future of the game.

Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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