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Dreamcast - The Grinch cheats

Secret present
There is hidden presnet on top of the town's Christmas tree

Destroy the indicated ammount of 750 gifts, then go to the upper 
level of Mount Crumpit to access ot newly unlocked mini-games.

Spin and Win mini-game: Destroy 750 gifts
Pankamania mini-game: Destroy 1,500 gifts
Copter Race mini-game: Destroy 2,500 gifts

Bike Race mini-game
Destroy 3,000 gifts and finish the game with 100% completion.
Go to the workshop. You can find the bike race mini-game 
behind the bookcase.