Offworld Trading Company is an upcoming RTS about setting up a business on Mars. The strategy title has been developed by independent studio Mohawk Studios, itself founded by Civilization IV designer Soren Johnson.
The aim of the game is to establish a powerful enough trading company to crush your competitors, not by military conquest but by simply having more money than them. Of course it's more complicated than that, but that's the general idea.
The game is based around a real-time player-driven market, where prices will rise and fall and resources will have varying levels of demand. Offworld Trading Company will leave Early Access on Steam on April 28.