ou can unlock Extra Costumes by beating the game on various difficulties.
Unlockable ............... How to Unlock
Ashtar Ryu costume ....... Beat story mode on the Hard difficulty setting.
Classic Ryuken costume ... Beat story mode on the Normal difficulty setting.

Golden Scarab Rewards

By collecting a certain amount of hidden Golden Scarabs, Muramasa (shop owner) will reward you with items and weapons that will help you in the game.

There is a total of 50 Golden Scarabs in the game.

Note: There are NO Golden Scarabs when playing as Rachel.
Unlockable ............... How to Unlock
Armlet of Fortune ........ Collect 40 Golden Scarabs
Armlet of Potency ........ Collect 5 Golden Scarabs
Dabilahro ................ Collect 20 Golden Scarabs
Great Spirit Elixir ...... Collect 35 Golden Scarabs
Jewel of the Demon Seal .. Collect 45 Golden Scarabs
Life of Gods ............. Collect 1 Golden Scarab
Lives of the Thousand Gods Collect 10 Golden Scarabs
Plasma Saber MkII ........ Collect 50 Golden Scarabs
Spirit of the Devils ..... Collect 15 Golden Scarabs
The Armlet of Benediction  Collect 30 Golden Scarabs
The Armlet of Celerity ... Collect 25 Golden Scarabs

Unlock Mission Mode

To unlock mission mode, beat the normal difficulty setting in story mode.