Tony Hawk's Downhill Jam Codes -

Cheat mode:
Select "Skateshop" at the main menu. Then, select "Buy Stuff" then choose the "Enter Code" option. Enter the following codes to unlock the corresponding cheat. Note: To purchase cheats without using the codes you must first complete the game in Story mode.

Always snowskate:
Enter SNOWSK8T as a code.

Mirrored maps:
Enter MIRRORBALL as a code.

Abominable Snowman costume:
Enter BIGSNOWMAN as a code.

Zombie skater costume:
Enter ZOMBIEALIVE as a code.