Overview
Ninja Gaiden, released in Japan as and in Europe as Shadow Warriors, is a 1988 side-scrolling beat-'em-up game, originally released by Tecmo as a coin-operated arcade video game. It was first released in North America and Europe in late 1988, and then in Japan in February 1989. It was the first game released in the Ninja Gaiden franchise. The arcade game was a major commercial success in North America, becoming the highest-grossing arcade conversion kit of 1989 in the United States.
Plot
Set in the retro-futuristic version on 1999, the player controls a ninja hired by the United States government to defeat an evil cult led by Bladedamus, a descendant of Nostradamus who seeks to fulfill his end of the world prophecies. Flooding the streets of the United States with criminals released from Alcatraz, Bladedamus has kidnapped the President and acquired codes for launching the nation's ICBMs.
Gameplay
The first player controls a ninja dressed in blue, while the second player controls one dressed in orange. Like most beat-'em-ups, players proceed through stages by defeating enemies scattered through each area.
From Wikipedia (CC BY-SA 4.0).