Unlock Difficulty Settings Beat the game on any difficulty to unlock a harder difficulty setting.
Unlock Ninja Dog: Die 3 times
Unlock Hard Mode: Beat the game on Normal difficulty setting.
Unlock Very Hard Mode: Beat the game on Hard difficulty setting.
Unlock Master Ninja Mode: Beat the game on Very Hard difficulty setting.
Golden Scarab Rewards Collect the following amount of hidden Golden Scarabs and the shop owner (Muramasa) will reward you with items and weapons that will help you in the game (when you play as Rachel there are NO Golden Scarabs).
Unlock Life of Gods: Collect 1 Golden Scarab
Unlock Armlet of Potency: Collect 5 Golden Scarabs
Unlock Lives of the Thousand Gods: Collect 10 Golden Scarabs
Unlock Plasma Saber MkII: Collect 50 Golden Scarabs
Unlock Spirit of the Devils: Collect 15 Golden Scarabs
Unlock Dabilahro: Collect 20 Golden Scarabs
Unlock The Armlet of Celerity: Collect 25 Golden Scarabs
Unlock The Armlet of Benediction: Collect 30 Golden Scarabs
Unlock Great Spirit Elixir: Collect 35 Golden Scarabs
Unlock Armlet of Fortune: Collect 40 Golden Scarabs
Unlock Jewel of the Demon Seal: Collect 45 Golden Scarabs