Street Fighter Alpha 3

Alternate Balrog 
Beat World Tour mode without unlocking Evil Ryu or Guile. Then at the character selection screen in any mode, highlight Balrog, hold L2 and press any button. 

Alternate Introduction Sequence 
Accumulate forty-eight hours of game play on the timer in the options menu. 
Then, instead of showing the arcade characters, the opening sequence will shows all the new characters (including Guile and Evil Ryu). Alternatively, unlock all character endings including the bonus characters. 

Bonus Modes 
Beat Dramatic Battle mode with Ryu/Ken and Juni/Jill to unlock two bonus modes. 

Classical Mode 
Accumulate three hours of game play on the timer in the options menu. Then at the character selection screen, highlight a character and press Select to play the classic version of their character. 

Dramatic and Final Battle Modes 
Beat Arcade mode on difficulty level 7 or 8. 

Fight Shin Akuma in Final Battle Mode 
Select Final Battle mode. Then, select a character and hold L1 + L2 before the versus screen appears. 

Maji (LO) Mode 
Accumulate five hours of game play on the timer in the options menu. 
Alternatively, beat arcade mode on difficulty level 7. 

Play as Guile and Evil Ryu 
Select World Tour mode and build your characters up to levels 30 (Guile) or 31 (Evil Ryu) then defeat all of the new battles. Guile and Evil Ryu will appear on the character select screen. 

Saikyo (low guard meter) Mode
Accumulate four hours of game play on the timer in the options menu.
Note: Saikyo Karin does not have the ability to do a 99% throw. Alternatively, beat arcade mode on difficulty level 7.