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 $315.1K — a different platform, not this one.

Subterrain: Mines of Titan

In the near future, a violent meteor collision on Titan deposits a large amount of rare materials into the icey surface of the moon. A mining company, TECC, sends a massive amount of personnel to establish a colony to harvest the resources. The mission, despite a promising development, is abruptly ended when the colony goes silent. After several years, a second team is sent to pick up the pieces and investigate what happened. They discover there’s no trace of the previous mining team, leaving the newcomers to believe that everyone had perished... ...until they find you. Engage with the struggling Camp Huygens and help the residents wrestle with the problems that threaten their survival. Every moment counts, and the world does not wait for you—the residents of the camp have needs of their own and can’t survive forever without intervention. The game doesn’t wait for your decisions—be careful, or you’ll become your own worst enemy! SURVIVAL Survive each day by taking care of day-to-day needs, such as hunger and thirst. Receive and treat injuries, such as bone fractures and blood loss. Scavenge equipment, or collect materials from the environment. Manage oxygen and energy while exploring abandoned mines. Struggle against the flow of time itself. COMBAT Intuitive and expeditious turn-based combat! Fight the horrors of Titan with melee and ranged weapons! Enemies evolve, gaining strength with time! Harness the power of nanomachines to use powerful abilities! Defend your reactor against invaders! CRAFTING Break down equipment into materials and craft components! Produce armor, guns, melee weapons, grenades and upgrades! Manufacture performance enhancers and medical equipment! Research items to design better versions, or fabricate advanced designs! EXPLORATION Explore the mining outpost of Camp Huygens. Talk to the residents and trade with various camp merchants. Discover the camp’s problems, and help the residents deal with them. Find evidence of what occurred, and survive long enough to escape Titan. MANAGEMENT The world is constantly simulated with each movement or action. Help manage the camp’s dwindling resources, and find ways to produce more. Assign tasks to the town’s residents, or help them with their own. Harvest materials and improve the town’s infrastructure. Build and upgrade crafting stations to create advanced equipment.