No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. Reviews and prices only.

Subterrain

Uncompromising Sci-Fi survival on Mars! Manage the entire colony single-handed! Craft, research, explore and fight against evolving mutants. Vast open world and randomly generated levels to explore! Can you survive long enough to escape the horror? Uncompromising survival mechanics. Struggle against your own bodily urges, such as thirst, hunger, exhaustion, and more! Struggle against the persistence of time! Race against the spread of the infection and evolving enemies. Explore randomly generated sub-levels and hand-crafted locations. Experience non-linear storytelling through logs and story sequences