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 $6.2M — a different platform, not this one.

Aragami

You are Aragami, a vengeful spirit with the power to control the shadows. You’ve been summoned by Yamiko, a girl imprisoned in the city fortress of Kyuryu. Embark on a dark journey full of blood and secrets to discover the truth about aragami. Infiltrate the occupied city of Kyuryu with your supernatural powers and fight Light with Shadow. Uncover a story about twin souls bound together by destiny that surpasses time and memory. EMBRACE THE SHADOWS - Create your own shadows to become invisible. Teleport from shadow to shadow while you hunt down your targets. Use a wide array of Shadow Powers to creatively dispatch your enemies. CHOOSE YOUR PLAYSTYLE - Multiple paths to beat each scenario and approach every situation. Play as a merciless emissary of death or an undetectable ghost. Your story, your choices. BECOME ARAGAMI - Fight Kaiho, the army of Light, and rescue Yamiko – the mysterious girl that summoned you and that is the key to your existence.