Consortium Achievements/Farewell (achievement)

Use several grenades to blow the door near where they are. You need the rifle with the underslung grenade launcher and at least 5 grenades for each door. Both can be aquired from the equipment locker in Mission Operations.
*Carla Croft is in Mission Operations. Blow the door between where she is sitting and the Cockpit.
*Luca Turel is in Global Operations by the door to the Lounge. He's literally standing right in front of the door you need to attack.
*Steve MacKai is in the hallway between Mission Operations and the Cabins on either side. Note: He can't be dead before the traitor attacks.
Farewell (achievement)