Here is the full list of all 29 Fat Princess Adventures trophies - there are 10 bronze, 12 silver, 6 gold and 1 platinum.
This is the platinum trophy and is unlocked automatically when all the trophies have been unlocked
Kill 300 Elite Enemies
Kill 2000 Gobblings
Kill 300 enemies in Fat Mode
Stun 5 enemies at the same time
Turn 6 enemies into chickens at the same time
Upgrade a mage gear piece to Max Level
Upgrade an engineer gear piece to Max Level
Win 5 Compete Objectives in an online Grindhouse replay.
Kill 300 enemies in Awesome Mode
Upgrade a warrior gear piece to Max Level
Complete a replay using the Grindhouse
Complete the game in Hard Mode
Get a character to level 20
Collect 100 pieces of gear
Complete the game in Cakemare Mode
Upgrade an archer gear piece to Max Level
Have 25 Gems Saved Up
Earn at least 2500 gold while playing each attitude (Hero, Clown, Evil Genius, Zen Master and Emo)
Complete through Chapter 7
Complete through Chapter 6
Complete through Chapter 5
Upgrade 5 pieces of gear
Have 5000 Gold Saved Up
Complete through Chapter 4
Complete through Chapter 3
Ignite 10 enemies on fire at the same time
Complete through Chapter 2
Complete through Chapter 1