Complete the game
Kill 250 enemies with environmental hazards
Defeat Crab Puncher without getting hit
???
Hop on 55 heads in a row without touching the ground
Chain-explode 5 enemies
Kick open the Coffin Rocket 20 times
Kill 5 enemies with a single gunshot
Collect all the ancient vampire skulls
Finish every level with the ranking "Dhampir"
Complete any level while taking no damage