Pixel Shinobi: Nine demons of Mamoru

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In the game Pixel Sinobi you play as a Ninja from the clan "Black Lotus". You have to confront the 9 demons of hell and the clan of Samurai "Steel Claw" who want to enslave the whole world.

The title was later re-branded to "Within the Blade" when it was ported for console release in 2021.

Source: IGDB