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 $32.9K — a different platform, not this one.

Drake of the 99 Dragons

The 99 Dragons Clan has been murdered. Even worse, the ancient artifact they guard, stolen. With its power, one can trap the souls of the living and resurrect those who have crossed over. As Drake, a member of the 99 Dragons, you have been mysteriously brought back from the dead to right these wrongs. Using supernatural weapons, martial arts and firearms galore, you will exact furious, brutal revenge and reclaim the artifact before it becomes the ultimate weapon of evil.  Key Features     3D action-shooter visualized in an animated Batman™ style environment Five seamless game stages with 25 intense missions intertwined with 30 characters in an in-depth storyline Discover the secrets of the “Undying Dragon” and the 3000-year old conflict of rival supernatural forces Choose from an array of firearms, short and long blade close combat weapons and thrown melee weapons Go into slow motion or Freeze Motion™ mode Utilize ancestral powers to summon a large ethereal dragon to fight at your side Run up walls and back flip off them while firing your guns in any direction Feed on the souls of the dead to replenish your health Features various improvements over the console releases Download includes a promotional comic