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.

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

Slime the security guards to get a present.

Hidden presents:
Look on top of the town's Christmas tree to find a hidden present.

Look for walls of ice in downtown Whoville. Shoot them with the rotten egg launcher. There are secret presents behind them.