Open up secret Tetris game:

To unlock a secret Tetris game, go to the 
Main Menu, and press and hold CTRL T E T.
Then a new option will be there called 
"Baseball Tetris". 


Play on the Moon:
 
To open a secret stadium on the Moon called
"Moon Park" beat the World Series 5 times on
the hardest difficult level without using 
cheats. Then it will give you a message 
saying that a new stadium on the moon is
available (this is a cool stadium, because 
the ball goes higher but moves faster, and 
your players can jump really high).


by unknown