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 $1.9M — a different platform, not this one.

Fly Corp

Develop your own transport network in different regions and cities: open new routes, buy and upgrade new planes, and increase airport capacity!   Control the passenger flow! The game features an advanced passenger flow system, and all the cities are real with a realistic population. The bigger the population, the more people want to fly. Each passenger has their own destination and they'll fly with layovers if there aren't any direct routes. You won't have enough money to connect every city to all the other cities, so you'll have to analyze the situation and make decisions about where your next transport hub will be. Just like planes, airports also have their maximum capacity. You'll lose if even one of them gets overloaded.  The whole world is your playing field! Almost 200 territories and tens of thousands of cities all around the globe are available! You can build an airport in any city and start transporting passengers. Different locations mean that you'll have to adapt: while in Europe distances are small and it's easy to manage your network, you'll have to think about connecting cities further away because the longer the route, the more you'll have to pay to open it.  Different game modes: Discover the World, Free Play, and Challenges. In Discover the World Mode, you need to unlock every territory in the world (each territory costs in-game money to unlock) and cover the whole planet with your network. You have to unlock a new territory every 6 minutes, or you lose. Challenges Mode includes scenarios with certain pre-set conditions and goals to reach. For example, to survive for a certain period or earn a specific amount of money. Each challenge is unique: in some of them you'll have to connect constantly unlocking airports, and in others rebuild your network due to coronavirus outbreaks. Also, there are daily scenarios. Every day you get a new scenario, and you'll have to hurry to take place on the Leaderboard!  Also, there are daily scenarios. Each day meets you with a new scenario, and you'll need to hurry to take place in the Leaderboard! Random events won’t let you get bored Sometimes random events occur. They can be positive (for example, investments in your company), negative (disasters stopping flights to or from certain territories), or just plain ridiculous (a businessman sues you because they spilled their coffee during turbulence). You never know what to expect! Compete with other players! Every challenge has a Leaderboard. Points are added for transporting passengers, earning money, and buying infrastructure. Try to reach the top! Create your own scenarios in the Editor and publish them, or play hundreds of scenarios created by other players! The game has a feature-rich Scenario Editor. Anyone can create and upload their scenario to the server or play scenarios created by others — there's an unlimited amount of new content.