Dragon Saber

Dragon Saber (full title: Dragon Saber: After Story of Dragon Spirit) is a vertical scrolling shooter arcade game that was released by Namco in 1990. It runs on Namco's System 2 hardware and as its aforementioned full title suggests, it's the sequel to Dragon Spirit, which was released 3 years earlier. The game's title was abbreviated by Namco as "DO" to separate it from Dragon Spirit's abbreviation, "DS".

As in the original Dragon Spirit, the player must take control of a prince transformed into a dragon by a flash of lightning - 1UP controls "Huey" (blue) and 2UP controls "Siria" (red), which means that two players can play simultaneously, but "Amul" (the protagonist of that original game) isn't present here.