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 $1.8M — a different platform, not this one.

Miasma Chronicles

In the not-too-distant future. America has been torn apart by a savage force known only as the ‘Miasma’. Meet Elvis, a young man brought to the mining town of Sedentary as a baby. Left by his mother in the care of a robotic older ‘brother’ and given a mysterious glove with which he can control the Miasma. Join the brothers on a quest across a post-apocalyptic wasteland to find the answers they crave. Answers which may change the course of human history forever. • Realtime exploration gameplay meets tactical, turn-based combat with RPG elements. • Explore rich beautiful environments meeting outlandish characters. • Upgradable weapons and abilities give your heroes the edge in combat. • An involving fantasy story through which you learn the truth behind the Miasma. From the creators of Mutant Year Zero: Road to Eden, comes a beautifully crafted tactical adventure you won’t forget.