Sekiryuuou is a Japanese NES game whose title translates to something like "Crimson Dragon King." This title suggests the game may be an action RPG or adventure game with a fantasy setting, featuring dragons and possibly a king as a central figure in the storyline.  More in-depth knowledge of its plot, gameplay, and development details would necessitate further research.

Sekiryuuou (Japan)

Seirei Gari (Japan)