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 $2.8M — a different platform, not this one.

Aragami 2

You are one of the last elite warriors of your kin, the Aragami. Victims of a supernatural affliction which corrodes the body and devours the mind, the Aragami control Shadow Essence - a mystical power which grants the ability to control the shadows. With this power the Aragami carry out their tasks and quests - assignments made all along the valley to ensure the subsistence of the village and to free the Aragami enslaved by the invader armies. PLAY IN SINGLE MODE OR IN CO-OP WITH YOUR FRIENDS Discover a full campaign and join the assassin squad up to 3 players in co-op. ENGAGE IN FAST-PACED STEALTH ACTIONS Manage covers and powers with agility. Take down your enemies with stealth kills and non-lethal takedowns. ENTER INTO COMBAT AS A TACTICAL DECISION Become the master of a skill based combat with high risk and high reward. BUILD YOUR SHADOW ASSASSIN Craft your weapons and armors and upgrade your elite warrior with a wide variety of abilities and shadow powers. PROTECT THE RASHOMON VALLEY Save your people and defeat the curse before it ends with you and discover how the Aragami became a legend.