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