Private Rank
     At the Title screen, press Square, Circle, Triangle, then start a
new game.

Sergeant Rank
     At the Title screen, press Triangle, Circle, Square, then start a
new game.

Lieutenant Rank
     At the Title screen, press R1, L2, L1, R2, then start a new game.

Captain Rank
     At  the Title screen, press Circle, R1, Circle, L1, Triangle, R2,
then start a new game.

Major Rank
     At  the  Title screen, press L2, Square,R2, Triangle, L1, Circle,
R1, then start a new game.

Colonel Rank
     At  the  Title  screen,  press  Triangle, Square, Circle, Square,
Triangle, Circle, then start a new game.

General Rank
     At  the  Title screen, press L1, L1, L2, L2, R1, R1, R2, R2, then
start a new game.

Master of X-Squad Rank
     At  the  Title  screen,  press  Circle,  Circle,  Circle, Circle,
Triangle, Square, Square, Square, Square, then start a new game.