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
Win 5 Compete Objectives in an online Grindhouse replay.
Ignite 10 enemies on fire at the same time
Upgrade an engineer gear piece to Max Level
Kill 2000 Gobblings
Upgrade a warrior gear piece to Max Level
Turn 6 enemies into chickens at the same time
Complete the game in Hard Mode
Earn at least 2500 gold while playing each attitude (Hero, Clown, Evil Genius, Zen Master and Emo)
Stun 5 enemies at the same time
Upgrade an archer gear piece to Max Level
Have 25 Gems Saved Up
Get a character to level 20
Kill 300 enemies in Fat Mode
Complete the game in Cakemare Mode
Collect 100 pieces of gear
Upgrade a mage gear piece to Max Level
Kill 300 enemies in Awesome Mode
Complete through Chapter 7
Complete through Chapter 6
Complete a replay using the Grindhouse
Complete through Chapter 5
Complete through Chapter 4
Complete through Chapter 3
Upgrade 5 pieces of gear
Have 5000 Gold Saved Up
Complete through Chapter 2
Complete through Chapter 1