Here is the full list of all 22 Phlegethon (EU) trophies - there are 14 silver, 7 gold and 1 platinum.
Get all trophies
Kill first zombie
Find your first secret
Blow up the first barrel
Enter the Nazi building
Kill the first pale vampire
Enter the church, next to the coffin
Behind the house of the Nazis, a soldier is hiding
Find the secret behind the bushes
Kill the Black giant on the graveyard
Enter the hunter's hut, next to the small statue
Find a pass, behind stones, in a cave
Kill two glowing enemies in the snow level
Find the secret by blowing up the barrel
Go through the ghostly container
Find the secret passage, that leads to the hangar
Find the secret passage, that leads to the pipe
Find the secret behind the cacti
Finish desert level
Destroy, rugged robot, on platforms
Kill the cyclops in the cave
Kill the last demon