Odysseus

Locate gift in Mason’s state room: After exiting the interrogation room and encountering the first enemies in the hall outside, duck into the room to the right. Look on the desk and interact with the document here to complete the challenge.

Incapacitate enemy personnel (x20) using Combatant Suppression Knuckles: In the first room of the level, you will see a box on the wall that you can access. Open this for the combat suppression knuckles, this will replace your knife as your melee weapon. Kill 20 enemies with the knuckles over the course of the level to complete the challenge.

Provide sniper overwatch for SEAL team advance across flight deck: During the first part of the mission, after trying to disable the security systems, you will head outside to a balcony area where you will see friendly troops firing at enemies down on the deck below. Grab a sniper rifle from nearby and help them eliminate all the hostile forces below to complete this challenge.

Eliminate enemy personnel (x10) with security turret: When you reach the area where you can hack the security turrets, do so and use them to kill 10 enemy soldiers to complete the challenge.

Destroy security turret (x3) while disabled: Hit a turret with an EMP grenade and whilst it is short-circuited destroy it. Do this thrice to complete the challenge. There are a number of these throughout the mission so you should have no trouble knocking three of them over!

Eliminate airborne enemies (x8) before they land: When you reach the flight deck of the aircraft carrier, you will see enemy soldiers parachuting down to the deck. Kill eight of these guys to complete the challenge.

Direct CLAW to eliminate enemy personnel (x5): On the flight deck you will find a CLAW to the left of where you arrive. To activate this, find a nearby passage to a control room that you can access by moving some rubble out of the way. Once it is activated, use the CLAW to kill 5 enemies.

Get to extraction in under 90 seconds: As soon as you reach the flight deck, drop ev