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 $490.2K — a different platform, not this one.

Miasmata

Day 1: I crashed upon the shores of the Eden this morning, rejected by the sea. Plague is coursing through my veins and I will die soon if I cannot discover a cure. Day 5: I am being hunted by a mysterious creature. It stalks me day and night. I cannot let my guard down, for he is a cunning and intelligent adversary. Day 9: Plague is ravaging my body now. It hunts me down just as the creature does. But, there is hope yet. I have been making progress in my search for a cure. I will need to do more scientific research and experimentation, but I am convinced this island holds the miracle I seek. Miasmata is a game of survival, exploration and discovery. During your adventure, you’ll encounter a mysterious and deadly creature. This creature can stalk you for miles, lurking behind grasses and vegetative cover. By treading carefully and quietly, you may be able to elude the creature. If you’re careless, however, you will be forced to confront the creature head-on. Exploration is a key component to Miasmata, so you will need to make full use of an interesting cartography system. You can use landmarks, such as ruins and statues, to triangulate your location and construct a map of Eden's boundaries and contours. Freedom to explore and discover the innermost secrets hidden on the island of Eden. Use landmarks, such as ruins and statues, to triangulate your location using the unique cartography system. Run lab experiments on the various plant and fungal specimens in order to find a cure for what ails you.