All-Around
Take first place in total score on at least 5 courses on freestyle mode.
Alpine
Take first place in time on at least 5 courses in freestyle mode.
Bonus Boards
Enter Freestyle mode and select all of the tracks. Now set the top record for each track.
Extra Levels
Place first in Competition Mode.
Freestyle
Take first place in trick scoring on at least 5 courses on freestyle mode.
Jamaican
Get a perfect 50.0 in the halfpipe
Mirror Mode
Win first place in competition mode, then hold R1 and press X on either competition or freestyle mode
Play as Alien and Snowman
Complete all 100 moves in Master mode and set all of the records in Freestyle mode.
Play as Alien and Snowman
Achieve a score of 40.0 or more on the Half-pipe course.
The Boss
Finish in the top 3 in Competition Mode.