Here is the full list of all 26 Felix The Reaper trophies - there are 10 bronze, 8 silver, 7 gold and 1 platinum.
Find All Silver Coins in All the Hardcore Levels
Get Four Skulls in Each of 10 Levels
Complete All Hardcore Levels in Chapter Four
Complete All Hardcore Levels in Chapter Three
Complete All Hardcore Levels in Chapter One
Complete All Hardcore Levels in Chapter Two
Complete All Hardcore Levels in Chapter Five
Complete All Main Campaign Levels
Complete All Main Campaign Levels in Chapter Five
Complete a Standard Level in 16 Seconds or Less
Complete All Main Campaign Levels in Chapter Four
Get Four Skulls in Each of 5 Levels
Complete All Main Campaign Levels in Chapter Three
Complete Your First Time Trial Level
Collect All Coins in a Single Hardcore Level
Complete a Hardcore Level in 40 Seconds or Less
Complete Your First Hardcore Level
Complete All Main Campaign Levels in Chapter Two
Complete All Main Campaign Levels in Chapter One
Complete Any Level Without Getting Caught in the Sun
Complete the Tutorial Stage
Collect All Trophies Listed
Get Four Skulls in Each of 15 Levels
Get Four Skulls in Each of 20 Levels
Complete All Time Trials
Get ALL Skulls in Each of the Main Campaign Levels