You are a ninja in N+. Your god-like speed, dexterity, jumping power, and reflexes are all the result of an amazingly fast metabolism; sadly, so is your natural lifespan of 1.5 minutes.
Like all Ninjas, you have an unquenchable thirst for gold and a natural propensity for exploring rooms infested by increasingly lethal Ninja-killing robots. N emphasizes pacifism, humility, and the need to traverse 5 rooms before the end of your lifetime; a feat known only as 'beating an episode'.
In accordance with the teachings of N, it is your profound hope that one day you will develop your platforming skills, intelligence, and inexplicable ability to reincarnate to achieve total mastery of all 300 levels.
-Conquer over 200 levels in single player or play with friends in over 100 Cooperative and 50 Competitive levels. This includes new levels never seen before.
-Play in PURE mode reminiscent of classic "N", or try out the new enhanced PLUS mode only in the handheld versions.
-Master stealthy Ninja techniques like wall-climbing and missile dodging to get past deadly laser drones, homing turrents, and other deadly enemies.
-Download new maps and replays from the N server every week.
-Design maps and share them with friends or the world using the integrated level editor and the infrastructure mode of PSP (PlayStationPortable) system.