Ninja Spirit

• Title — Ninja Spirit • Developer — Irem Bits Studios (Game Boy) • Publisher — Irem NEC (TurboGrafx-16) Activision (Amstrad CPC) • Composer — Masahiko Ishida • Genre — Hack and slash, platform • Modes — Single-player • Platforms — Arcade, TurboGrafx-16, Amiga, Amstrad CPC, Atari ST, Commodore 64, Game Boy, ZX Spectrum • Released — Arcade

• Illustration — Arcade screenshot Tsukikage's journey takes him through seven stages, varying from woodlands, wastelands, swamps, temples, and cliffs. Each stage begins with the player slashing their way to the end until they confront a level boss. The ninja is always armed with the katana named Muramasa (meaning Righteous Cloud), which can be fluidly used to attack in all directions. Extra weapons include the Uzha (meaning Swirling Leaf) (shurikens), the Raitake (meaning Bamboo Thunder) bombs, and the Shoryusai (meaning Rising Dragon) kusarigama. There are also several power-up items, such as one unleashing multiple ninja ghosts to assist the player.

The game's hero, Tsukikage, is a young ninja who lost his father to a mysterious half-man half-beast creature. The plot of Ninja Spirit is based on the quest of his way to avenge his father in an alternative feudal Japan.

The game was ported to multiple platforms. The TurboGrafx-16 port includes two modes, a PC Engine mode which players lose one life only if all 5 energy points are used up (certain enemies can kill Tsukikage with one hit), and the Arcade mode, which is a more challenging mode where any attack are grounds for players to lose one ninja instantly. The port was released on the Wii's Virtual Console in 2007 and Wii U in 2015 in Japan and 2017 for North America and Europe. Hamster Corporation released the game as part of the Arcade Archives series for the Nintendo Switch and PlayStation 4 in 2019.

In Japan, Game Machine listed Ninja Spirit on their September 1, 1988 issue as being the fifth most-successful table arcade unit of the month, outperforming titles like The Main Event. In issue 15 of Electronic Gaming Monthly, both Ninja Spirit and Ys Book I & II were the first games to receive a perfect 10 in the magazine's history. In 2010, CraveOnline featured this version in the article Top 10 Ninja Games Of All Time, comparing it with Legend of Kage for the NES, but considered both "challenging" and "relaxing" at the same time.

Ninja Spirit later appeared in the Japan-only Game Boy title, Shuyaku Sentai Irem Fighter along with other characters from the game, as well as characters from three other Irem franchises: R-Type, Battle Chopper, and Hammerin' Harry.