New Game Plus Mode:
Complete the game and at the end, when prompted, save your game. Then, from the title screen, load your saved data to start a new game with everything you had when you beat the game.
Survival Mode:
Complete the game on Normal difficulty to unlock "Survival Mode."
Weapon Select:
Follow the same instructions for unlocking "New Game Plus." On the "Katana Select" menu, press L1 and R1 to equip swords to both hands.
