Metal Gear Rising: Revengeance - How to Unlock Revengeance Difficulty Mode

"Metal Gear Rising: Revengeance has a couple of different difficulty modes players can try. In addition to Normal Mode, players can opt for Easy Mode, Hard Mode, Very Hard Mode, and Revengeance Mode. Revengeance Mode is the hardest mode of all, requiring the player to have mastered all the controls and know all the enemies that they'll face in the game." - click image for article