Super Street Fighter 2 Turbo
Play as Akuma:
At the Character select screen highlight Ryu for four seconds, then T-Hawk for four seconds, then Guile for four seconds, then Cammy for four seconds, then Guile again for four seconds, then highlight either Ryu or Ken for four seconds, then hold down all 3 PUNCH buttons and the Start button. if your timing is right you will see a mysterious black figure on your screen - You're Akuma.
Street Fighter Alpha 2 Gold
Play as Cammy:
To access Cammy you must play as M. Bison in Arcade mode and beat the game with a high enough score you take the #1 slot, then enter your initials as CAM. Now you can play as Cammy, but only in Versus mode by highlighting M. Bison at the Character select screen and pressing the START button twice.
Press Start twice on Chun-Li for her skirted costume in blue, three times for her skirted costume in grey.
Ever wonder what would happen if Akuma took over Ryu's body? Find out by
pressing the START button twice.
Extra Sakura Costume:
To change Sakura's costume hit the START button 5 times for 6 different color
schemes. This also works on Akuma.
Thanks to Revolution readers Mike Buehring, Nathaniel Cooper, AJ, and Tinu the Phat Cat!