You need to complete Chapter 3 on Any Difficulty Level

You need to complete Chapter 2 on Any Difficulty Level

You need to complete Chapter 1 on Any Difficulty Level

You need to make a negative coop morality choice

You need to complete Chapter 4 on Any Difficulty Level

You need to complete Chapter 5 on Any Difficulty Level

You need to customize a weapon to high aggro

You need to kill 400 enemies with assault rifles, sub machinguns or shotguns

You need to kill 3 or more enemies with a single grenade

You need to use 15 enemies as human shields

You need to make a positive coop morality choice

You need to tie up 15 enemy combatants instead of executing them

You need to kill 50 enemies with a melee or bayonet

You need to Co-Op Snipe 5 enemies

You need to kill 150 enemies with a pistol

Continue playing to unlock this secret achievement.

You need to shoot 2 enemies in the head with a single bullet

You need to kill 100 enemies with a sniper rifle

You need to heal your partner 10 times

You need to save every hostage

You need to complete the Game on Any Difficulty Level

Continue playing to unlock this secret achievement.

Continue playing to unlock this secret achievement.

Continue playing to unlock this secret achievement.

Continue playing to unlock this secret achievement.

You need to listen to all of the Radio Broadcasts

Continue playing to unlock this secret achievement.

You need to charge through 20 enemies

Continue playing to unlock this secret achievement.

You need to kill two enemies with simultaneous Quick Draws while in Co-op Mock Surrender

You need to finish the game as best friends

You need to shoot all Maneki Neko cats in the game

Continue playing to unlock this secret achievement.

You need to collect $1,000,000

Continue playing to unlock this secret achievement.

There are some bad ass masks lying around the city. Find one or two to change your look.

Continue playing to unlock this secret achievement.

Complete Chapter 8 on any difficulty level.

Continue playing to unlock this secret achievement.

Escort all hostages to safety.

Meilin Jun is a snitch and a traitor. Give her what she deserves.

Continue playing to unlock this secret achievement.

You've got a chance to take out Jonah, the leader of the FDI. Don't blow it.

Meilin Jun betrayed the civilian resistance but if it's of no consequence to you, let her live.

Dr. Wu is digging up some intel for you. Make sure he stays alive long enough to find it.

Complete Chapter 9 on any difficulty level.

Continue playing to unlock this secret achievement.

You need to complete Half the Game on Contractor Difficulty

Continue playing to unlock this secret achievement.

Continue playing to unlock this secret achievement.

Continue playing to unlock this secret achievement.

You need to complete the Game on Contractor Difficulty

You need to kill 6,666 people in Campaign

You need to finish the game in a fractured friendship

You need to allow your partner to snipe 5 guys while in Mock Surrender

You must survive an entire level in one session without being downed on normal difficulty or above

You need to kill 25 enemies with a quick draw from mock surrender

You need to collect All Weapons and Weapon Parts