Use all guns at least once

Clear Chapter 2 using Nigel the Bat

Perform every ground kill in the game

Use all throwing weapons at least once

Beat the epilogue with secret ending

Collect all the puzzle pieces

Beat the main story

Destroy 200 glass panels

Use a human shield

Throw a weapon at an enemy so that his weapon hits another

Perform a 12x combo

Perform an 8x combo