Ninja Gaiden 3: Razor's Edge is the enhanced version of the original Ninja Gaiden 3 , significantly reworked by Team Ninja to bring back the brutal difficulty and complex combat mechanics the series is known for. Core Gameplay Mechanics

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A massive collection of standalone combat challenges ranging from "Acolyte" to "Ultimate Ninja" difficulty. These can often be played in co-op mode.

Earned by performing combos, kills, and Ultimate Techniques (holding the heavy attack button when your weapon glows red). Karma is used to purchase weapon upgrades, new skills, and costumes.