Fight Shin Akuma
Select a Super Street Fighter 2 Turbo character in Arcade mode, then beat the game without losing any rounds or using any continues. The difficulty setting does not matter. When you reach M. Bison, Shin Akuma will come in just as the match is about to start and do the raging demon on M. Bison, and you will proceed to fight Shin Akuma instead. Shin Akuma is much faster than regular Akuma, inflicts more damage, and can perform two air fireballs instead of one.

Unlock Extra Options
Beat Arcade Mode with Gill.

Unlock Gill
Beat Arcade Mode with all of the Characters.

Unlock System Direction Page 10
Beat Arcade Mode with 15 Different Characters.

Unlock System Direction Page 8
Beat Arcade Mode with 5 Different Characters.

Unlock System Direction Page 9
Beat Arcade Mode with 10 Different Characters.

Storing Mode
When selecting which version you want to play as, hold Start and select "SUPER TURBO". Release Start then select you character. Now, if you select Chun-Li, E.Honda, or Vega, they have the ability to "Store" special moves and Super Combos. For example, do the super motion for Chun-Li's Senretsukyaku partially (Charge Back for 2 seconds, Forward, Back, then hold Forward without pressing K). Now the move is stored. Next time you press a Kick button, the Senretsukyaku will come out instantly.

Fight Shin Akuma
Select a Super Street Fighter 2 Turbo character in Arcade mode, then beat the game without losing any rounds or using any continues. The difficulty setting does not matter. When you reach M. Bison, Shin Akuma will come in just as the match is about to start and do the raging demon on M. Bison, and you will proceed to fight Shin Akuma instead. Shin Akuma is much faster than regular Akuma, inflicts more damage, and can perform two air fireballs instead of one.

Fight Q in SF3:TS Arcade Mode
This works on any difficulty. To fight Q, play a game and don't lose a single match. At the 8th match after defeating your opponent, Q's will appear on screen, and you'll fight him in the 9th round.

Selecting the 13th costume in SF3:TS
There is a 13th costume for each character. Select your character by pressing Square + Circle + R1.

Skip over characters in HSF2 Arcade mode
While playing arcade mode, once you know who your next opponent is, use the second controller to challenge. Have the second player be the fighter you were about to fight before. Defeat him/her and return to the one player game. That character will be eliminated from the opponents list in Arcade mode and you will move on to the next person. This can be done for all characters except Bison. This secret can be helpful in trying to fight Shin Akuma.

Play as Akuma in HSF2
Highlight the following people for about 1 second each: Ryu, T.Hawk, Guile, Cammy, then Ryu again. Then press Start and all 3 punch buttons simultaneously. Note: You can only play as Akuma in Super T mode.

Normal alternate color in Hyper SF2
When choosing a character in Normal, Super, or "old" Super mode, press Start to choose them instead of an attack button. These colors were originally used in Super Street Fighter II Turbo when both players chose the same character in "Super" mode.

Street Fighter III : Third Strike Unlockables
By beating the Arcade Mode, you can unlock these secrets in Street Fighter III : Third Strike. It can be done on any difficulty with the System Direction Mode set on Normal.

Gill - Beat Arcade Mode with all of the Characters.
System Direction Page 10 - Beat Arcade Mode with 15 Different Characters.
System Direction Page 9 - Beat Arcade Mode with 10 Different Characters.
System Direction Page 8 - Beat Arcade Mode with 5 Different Characters.
Extra Options - Beat Arcade Mode with Gill.

8th Color for Hyper Street Fighter 2
Select Super SF2 Turbo as your player type. Highlight the character you wish to play as, then press and hold any punch or kick button until your fighter changes color. Your fighter is now wearing his/her 8th costume.

Selecting 14th Costume Color
Only applies for Street Fighter: 3rd Strike) You must have beat the game with that character first, after doing so, highlight your character and hold start and press any 2 button combinations.

Selecting 15th Costume Color
Only applies to Street Fighter: 3rd Strike) You must have already beat the game for that character first, after doing so, highlight that character, hold start and press 2 button combinations, highlight the same character with controller 2(if you were controller 1), controller 2 will now have the 15th costume color!