Ninja Five-O features a ninja cop battling evil ninja masters and terrorists.

Joe Osugi, bizarre 'anti-terrorist ninja', is called in to assist the local police, who seem to be completely useless in rescuing some hostages.

The game is basically a series of rooms connected together. Your job is to rescue the hostages and then escape the stage through the red door. You have in your arsenal a three-level shuriken, a sword, and a grappling hook similar to the one from Bionic Commando. Joe also has two special abilities: to make himself invincible and to attack all enemies on screen.

Memory improves the previous TAS by 28.64 seconds, thanks to better optimisation and new tricks. Please read the author's comments for more details.