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

BLACKSHARD

BLACKSHARD is a first-person exploration game. Wander through a strange megastructure, the Labyrinth, to unravel its mysteries. Your behavior within the Labyrinth defines the outcome of your journey. BLACKSHARD is a visual and narrative experience, a dreamlike journey into uncharted liminal spaces. You will roam strange places, endless corridors and unreal architectures, encountering mysterious figures that have been forgotten for ages... What path will you take? Explore a unique semi-open world. Find your own way through the Labyrinth. Find shards of memory from those who came before. Accept the order of things or choose a different path. Interact with your environment. Transform the Labyrinth with unspeakable powers, or preserve its cold complexity. Beware. You were not made for such a journey. "I waited for a time that cannot be told. The Labyrinth is a dull, sterile and ordered space. It is the embodiment of time and causality. The harbinger of the Tyranny of Fate. I played my part. I watched over the Labyrinth. I resisted the whispers. I did not intervene. I did not count the unclean numbers. But the Sign promises. It offers."