Continue playing to unlock this secret achievement.
Complete a mission (excluding New Blood) with a human partner
Level up to Rank 5
Level up to Rank 15
Level up to Rank 25
Fully customize a weapon with 6 customizable parts or more
200 targets killed in single Overkill (Triggered by you)
500 targets killed while in cover
200 targets killed in double Overkill
200 targets killed in single Overkill (Triggered by your partner)
100 targets killed using either an MMG or an MGL
Destroyed 500 objects
Buy All Guns
Buy All Outfits
Complete the game on Insane
Buy all Weapons, Tattoos, Masks and Outfits
Perform 250 Flank, Surprise and/or Tag Team kills
You took the Aggro for 100 Flank kills
Perform 100 Headshots
Perform 100 melee kills
You didn't go wounded once in a mission (medium, hard or insane)
Perform a x10 Co-op Combo
Perform a melee kill while you're in Overkill
Perform 10 cover to cover transition in a row
