Sky Odyssey - Platform: Playstation 2

Auto Gyro 
---------
Successfully complete all levels in sky 
canvas mode with more than 90 points to 
unlock the Auto Gyro.

Corsair 
-------
Accumulate enough acrobatic points in 
adventure mode to have ten of your mission 
grades marked with circles to unlock the 
Corsair.

Gold UFO 
--------
Successfully complete all levels in 
target mode with a gold rank to unlock 
the Gold UFO.

Me-262 
------
Successfully complete adventure mode to 
unlock the Me-262.

Silver UFO 
----------
Successfully complete all levels in the 
adventure mode with an A rank to unlock the 
Silver UFO.

Stealth Fighter 
---------------
Successfully complete all levels in adventure 
mode with a total time of 10 minutes or less 
to unlock the Stealth Fighter.