Dragon Saber(ドラゴンセイバー) is a vertical scrolling shooter arcade game that was released by Namco in 1990. It is the sequel to Dragon Spirit, released three years earlier.
The human beings have repeated their own foolish history, because of their own desires. And everything around then has amounted to come to nothing. Advanced alchemy has caused environmental disruption. The world has been filled with evil creatures. And the human beings have threatened with extinction. Meanwhile, the sun god, Amaterasu appeared from the sky to human, and told. "The brave young man Huey and Siria. I grant you this sacred saber." "Show your good spirit!"
As in the original Dragon Spirit, the player controls a dragon who shoots at air-based enemies and bombs ground-based enemies, except this time two players can play simultaneously - player one controls Huey (the blue dragon) while player two controls Siria (the red dragon).
Source: Wikipedia, "Dragon Saber," available under the CC-BY-SA License.