The Grinch Codes -

Spin 'n' Win mini-game:
Destroy 750 gifts, then go to the upper level of Mount Crumpit to access the Spin 'n' Win mini-game.

Pankamania mini-game:
Destroy 1,500 gifts, then go to the upper level of Mount Crumpit to access the Pankamania mini-game.

Copter Race Contest mini-game:
Destroy 2,500 gifts, then go to the upper level of Mount Crumpit to access the Copter Race Contest mini-game.

Bike Race mini-game:
Destroy 3,000 gifts and complete 100% of the game. Look behind the bookcase in the workshop with the sleigh to access the Bike Race mini-game.

Hint: Extra presents:
Use the egg launcher to shoot the kids to make them drop their presents.