Kill 100 enemies total using Sniper Rifles.
Kill 150 enemies total using Handguns.
Kill 250 enemies total using Shotguns.
Kill 100 enemies while in the power mode of Overkill.
Kill 75 enemies while in the stealth mode of Overkill.
Complete all missions with the Partner AI.
Kill 250 enemies total using SMGs.
Kill 5 enemies total using Co-op Snipe.
Kill 25 Martyrs by shooting the Bomb Packs on their chests.
Earn one million dollars in total over the course of campaign mode.
Continue playing to unlock this secret achievement.
Complete all missions as a Professional.
Collect all of the information cases in the entire game.
Kill 50 enemies total in Co-op Riot Shield.
Drag and heal your partner 25 times.
Purchase the MP7, M134, DAO-X Protecta, MGL MK-X, and the M107 Light Fifty.
Kill 250 enemies total using Machine Guns.
Kill 50 enemies total in Back-to-Back.
Kill 30 enemies using the Riot Shield melee attack
Purchase every mask variant.
Kill 250 enemies total using Assault Rifles.
Complete a ranked match without ever needing to be revived.
Earn one billion dollars in total in ranked matches.
Kill 25 enemies total using RPGs.
Kill 25 Heavy Armor enemies.
Complete 20 minor objectives in a ranked match.
Finish playing a versus ranked match.
Win a ranked match without purchasing any additional weapons.
Kill 50 enemies total using the Melee Attack.
Purchase 3 weapons.
Heal your partner for the first time. Training does not count.
Spend 1 minute straight at full Aggro.