Games like Ninja Gaiden

If you finished Ninja Gaiden, the closest matches are Cactus McCoy and the Curse of Thorns, Cirno's Perfect Punchout!!, Madoka Magica Grief Syndrome, Ninja Kazan and Fallen Angel: The War in Heaven. All 8 share its hack and slash/beat 'em up genre and are ranked by how closely their themes and modes overlap.