* Unlock Five Extra Missions
At the mission mode screen, press:
Up, Down, Left, Down, Right, Up, Square
* Unlock Costumes
Beat the game on the corresponding difficulty to obtain each costume:
Classic Ryuken costume – Beat story mode on Normal
Ashtar Ryu costume – Beat store mode on Hard
* Golden Scarab Unlockables
Obtaining the corresponding number of Golden Scarabs will unlock a rare item:
Life of Gods – 1 Golden Scarab
Armlet of Potency – 5 Golden Scarabs
Lives of the Thousand Gods – 10 Golden Scarabs
Spirit of the Devils – 15 Golden Scarabs
Dabilahro – 20 Golden Scarabs
The Armlet of Celerity – 25 Golden Scarabs
The Armlet of Benediction – 30 Golden Scarabs
Great Spirit Elixir – 35 Golden Scarabs
Armlet of Fortune – 40 Golden Scarabs
Jewel of the Demon Seal – 45 Golden Scarabs
Plasma Saber MkII – 50 Golden Scarabs