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 $681.1K — a different platform, not this one.

Primordia

What happened to the humans? Set in a post-apocalyptic world strewn with cast-off pieces of machinery, Primordia tells the story of Horatio Nullbuilt, who finds his peaceful existence threatened when a rogue robot steals his power core—the sole source of energy fueling his ship and keeping him alive. To recover it, the robot and his companion, Crispin, must leave behind their idyllic home for Metropol, the city of glass and light. Their quest to reclaim what has been taken away will lead Horatio to unexpected discoveries about his origins—and a new understanding of the humans who walked the earth before him. Puzzles that emphasize logical thinking and exploration rather than trial and error or pointless backtracking. A streamlined interface, player-friendly design combined with the challenge and depth of the classics. Features over fifty hand-drawn rooms to explore, dozens of distinctive characters to meet, and gorgeous painted cutscenes to soak in.