Activate a mutation in a match.

Achieve a Gold rating on any Story mission.

Complete The Renegade on any difficulty.

Complete a Story mission without losing any Lives.

Kill 100 zombies

Kill 50 zombies

First Headshot with a gun

Pick up a backpack (Bug-Out-Bag)

Finish off any boss using the Ground Spark technique.

Defeat 3 enemies with one Throwing Anchor.

Defeat 4 of the Order of No Quarter.

Impress Mona with your skills.

You know, the V-Trigger is pretty handy for shifting the flow of battle. You'll know just how effective it is once you've triggered it 100 times.