Stealth take-down 30 enemies

Find a Journal Note

Defeat 4 enemies with the same explosion (all explosive items and weapons apply)

Stealth take-down 5 enemies

Finish the Game on Hard Without Changing the Difficulty

Finish the Game on Easy Without Changing the Difficulty

Kill 30 Enemies with the M9

Kill 30 Enemies with the Mk-NDI

Defeat 20 Enemies by Blind-Firing While in Cover (without aiming)

Defeat 20 Enemies While Swimming

Successfully Counter all of a Brute's Damage-Giving Attacks

Find 20 Treasures

Kill 20 Enemies with Headshots