by collecting a \"special key\" from the dead zombie in the underground tunnel next to the police station. Choose difficulty normal start game, reach the police station with out picking any item this includes ammo. Enter the police station and then go back out to the right will be an underground tunnel in there will be a zombie in odd clothes. kill him and seach his body and take the special key. Play normaly until you reach the dark room the first room will have a cupboard unlock it and then you can wear different clothes!!!
Effect: Enables you to use the special character, Akuma
During the game
Play through whole game (both scenarios) with either characters 6 times. But you must get an A rating in all of them. Once achieved you'll get a clue. Start the game for the 7th time and enter your name as AKUMA on the lab computer on both scenarios. Akuma will bust through a cryotank and you can use him.
Complete either character's first scenario without saving the game in under 2.5 hours with an A or B ranking for the special rocket launcher. Complete either character's second scenario without saving the game in under 2.5 hours with an A or B ranking for the special gatling gun. Complete either character's second scenario without saving the game in under 3 hours with a A or B ranking for the special machine gun. The special weapon will appear in the next game after the first chest is opened.