Here is the full list of all 12 Ghoulboy: Dark Sword of Goblin trophies - there are 11 gold and 1 platinum.
Obtain all trophies
Finish all the levels
Pass the Samora level
Complete 20 levels
Buy all upgrades
Obtain 5000 coins
Kill the second boss
Complete 10 levels
Kill the first boss
Die 30 times
Throwable 100 objects
Big Sword