Ninja Gaiden II: The Dark Sword of Chaos, also known as Shadow Warriors II: The Dark Sword of Chaos in Europe, is a side-scrolling platform game for the Nintendo Entertainment System developed and published by Tecmo (NES). This is the second game in the Ninja Gaiden trilogy for the NES, and it was released in 1990 in North America, Japan, and Europe. In 1990, Nintendo released an arcade video game version on their PlayChoice-10 system.