Here is the full list of all 12 BloodRayne: Betrayal trophies - there are 7 bronze, 4 silver and 1 gold.
Activate BloodRayne: Betrayal's alternate soundtrack
Find the hidden idol
Finish every level with the ranking "Dhampir"
Complete the game
Collect all the ancient vampire skulls
Chain-explode 5 enemies
Hop on 55 heads in a row without touching the ground
Complete any level while taking no damage
Kick open the Coffin Rocket 20 times
Defeat Crab Puncher without getting hit
Kill 250 enemies with environmental hazards
Kill 5 enemies with a single gunshot