No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $61.9K — a different platform, not this one.

Freight Tycoon Inc.

Freight Tycoon is an economic simulation game which challenges players’ management skills. It puts one into the shoes of an owner of a cargo transportation company. One has to evaluate the profitability of contracts, contact customers, and appoint drivers to deliver goods. Office development is also an essential part of success in business. Employing and dismissing workers, buying new vehicles and keeping technical records competently. But one should be aware of rivals which are interested in forcing out your company out of the market. The game is set in a fully 3D world with various landscapes and season changes. The appearance of buildings, vehicles and headquarters change interactively, so one can see the results. Freight Tycoon Inc. gives you a unique opportunity to extend the world of Freight Tycoon and create your own cargo transportation empire. Key features: Elaborate interface 30 interactive 3D maps 3 levels of office development Make contracts Buy and sell motor vehicles Employ and dismiss workers Over 100 car models Bonuses for jobs done