Thrillville - Platform: Sony PSP

All parks:
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While in any park, press 
Square, Circle, Triangle, Square, Circle, Triangle, Square 
to unlock all parks.

All rides:
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While in any park, press 
Square, Circle, Triangle, Square, Circle, Triangle(2) 
to unlock all rides.

Extra $50,000:
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While in any park, press 
Square, Circle, Triangle, Square, Circle, Triangle, X.

Mission completion:
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While in any park, press 
Square, Circle, Triangle, Square, Circle, Triangle, Circle. 
Then at the mission selection screen, press Square to complete 
the highlighted mission and unlock the next mission. 
Note: Each time Square is pressed on a highlighted mission, 
the rank of the completion increases (from bronze, to silver, 
and finally gold).