Ninja, a Sega Master System game released in Japan, focuses on stealth-action gameplay. This version, with limited information available, likely featured side-scrolling levels where the player controlled a ninja character, utilizing their skills to overcome enemies and obstacles.  Gameplay details would require further research to be more descriptive. The Japanese release suggests a specific appeal to the Japanese market during the Sega Master System's lifespan.

Ninja (Japan)

My Hero (USA, Europe)