The controls for this game are basically the same as the other games but with a few improvements:

Blocking: moving the control away from your opponant. This will defend all normal damages and decrease the damage of special moves by 75%.
Clutch movement: by standing beside your opponant and simultaneously holding forward and pressing a punch, your charcter will either throw or grab your opponant.
Throw recovery: executing a throw maneuver after being thrown, your character will land safely on the ground.
Recovery: moving back and forth quickly after you have been dizzied will help to recover.
Dashing: your character can dash forward or backwards by tapping F, F or B, B respectively.
Special jumps: your character can perform an especially long jump vertically, forward or backward by tapping D, U or DB, UF or DF, UB.
Super Arts: replace Super Moves. Essentially, it is the same but you are prompted to select one that you will have to use for the entire game. Also, instead of having a maximum of 3 supers, your maximum will depend on the Super Art you select. One final difference is that Super Arts can be performed immediately after a special move for a combo.
Stun meter: a new addition prompting when a character will be stunned or dizzied. This meter is located below the health bar and will increase as your opponant hits you (blocked or not) and vica versa. The bar will decrease as you dodge or parry attacks or prevent your opponant from attacking at all.
Parrying: in order to block an attack without incresing your stun bar, you must parry. It is performed by tapping F or D at the instant the attack hits the block (like an alpha counter). This can be followed up with an attack of your own to complete the counter. An important note is that you must parry each of the hits in order to prevent the stun meter from increasing. In other words, you must parry each hit of a combo, special move, or super art to prevent damage.
Air blocking: there is, in essence, no air blocking but you can air parry. By tapping D, you will parry the block and land near your opponant, or F to do the same except bounce off the attack.
Overheads: all characters have an overhead attack as they are jumping in. This is performed by tapping D, D + any punch or kick.
EX moves: by pressing 2 buttons instead of just one, your character will perform an EX move. Overheads can also be used as an EX move. Requires 1 Super Bar.

Street Fighter III:Second Impact Giant Attack

Alex

UNIQUE MOVES

SPECIAL MOVES

SUPER ARTS

Ryu

SPECIAL MOVES

SUPER ARTS

Ken

SPECIAL MOVES

SUPER ARTS

Ibuki

SPECIAL MOVES

SUPER ARTS

Dudley

SPECIAL MOVES

SUPER ARTS

Oro

SPECIAL MOVES

SUPER ARTS

Necro

UNIQUE MOVES

SPECIAL MOVES

SUPER ARTS

Yun

UNIQUE MOES

SPECIAL MOVES

SUPER ARTS

Yang

UNIQUE MOVES

SPECIAL MOVES

SUPER ARTS

Elena

SPECIAL MOVES

SUPER ARTS

Sean

SPECIAL MOVES

SUPER ARTS

Urien

SPECIAL MOVES

SUPER ARTS

Hugo

SPECIAL MOVES

SUPER ARTS

Akuma

SPECIAL MOVES

SPECIAL MOVES

Street Fighter III:
Second Impact Giant Attack