Adidas Power Soccer '98 Cheats

Big head mode:
Press Square, Circle, Circle, X, Triangle, X, Square, Circle.

Hidden teams:
Press X, Triangle, X, Square, Circle, Square, X, Triangle. A new flag will appear to the right of The Netherlands.

View credits:
Press Circle, Square, Triangle, Circle, X, Triangle, Triangle, Square.

Bonus stadium:
Press Square, Circle, Square, Triangle, Triangle, Circle, X, X

Win match:
Press X, Triangle, Triangle, Circle, X, Square, Circle, Triangle. Then, pause gameplay to win the match.

Stupid commentaries:
Press Triangle, Square, Circle, Square, X, X, Square.

Thanks to Revolution readers Thuglife Member and Mark Northcott!