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 $986.6K — a different platform, not this one.

Silence

War rages on. During an air raid, 16 year old Noah and his little sister Renie seek shelter in a bunker. There, not only are they protected from the deadly bombardment, but are also at the crossroads of a world between life and death: Silence. When Noah’s sister gets lost in Silence, he is forced to venture into this idyllic yet threatening world to find her. Silence , however, bears its own scars of war and suffering. Dark creatures haunt towns and cities and ravage this once serene place between worlds. Only a small band of rebels stands against the looming menace. Now it is up to the siblings to save Silence and its fantastic inhabitants from impending doom and thus also save their own lives. Join Noah and Renie on their exciting journey through Silence where an emotionally gripping story of contrasts between serenity and danger unfolds. Meet fascinating and likeable characters like Spot, the magical caterpillar who helps Noah and Renie on their way through Silence. And witness when the siblings discover that the only thing that can save them is their love for each other. Elaborately designed 3D characters and opulent 2D backgrounds Up 12 hours of enjoyable playtime Three playable characters There will be exciting new characters, but also a reunion with old friends