 According to the NPD Group, in its first month "Ninja Gaiden" sold 362,441 copies in the United States.By August 2006, "Ninja Gaiden" had sold 550,000 copies and earned $27 million in that country.Between January 2000 and August 2006, it was the 100th highest-selling game launched for the PlayStation 2, Xbox or GameCube consoles in the United States.