Here is the full list of all 22 Kingdom of Arcadia (EU) trophies - there are 4 bronze, 9 silver, 8 gold and 1 platinum.
Unlock all other trophies
Find 10 secret elements
Get the second magic scepter
Complete level 2-5
Complete level 2-4
Complete level 2-3
Upgrade your knife
Find 5 secret elements
Complete level 2-2
Complete level 2-1
Get the first magic scepter
Complete level 1-5
Complete level 1-4
Complete level 1-3
Upgrade your sword
Open the first wall
Complete level 1-2
Upgrade your armor
Find your first secret element
Complete level 1-1
Find a secret area
Destroy the first enemy