3 Dog Tags
Continue until you reach a corridor with a powerful draft. Shoot the debris blocking the door to the right to stop the draft and for your team to continue. Regroup with your team and head to the viewing deck. Bella will open the next door. Proceed till you find more PMCs waiting in the next hallway where the escape pods are located. There's also a M240 Incinerator Unit that you can get from a small storage room beside the hallway with the PMCs.
After clearing the first escape pod bay, continue past the locker room and head to the next bay. Kill more PMCs here. There's another dog tag in the area. Proceed to the main hall then turn right to the first corridor then right again. You should find the dog tag on top of a metal crate.
Clear the enemies and follow Bella and Oneal to the elevator. Upon disembarking, check the room with the broken door right beside the elevator for some supplies. Follow your team as they make their way to the Coolant Storage room where more enemies await. Take out both xenos and PMCs then make your way to the next corridor and to the second coolant storage area.
After clearing it, proceed to the control room ahead then run a bypass on the highlighted terminal. Exit the room and go downstairs. Be careful since more xenos will ambush you in the cover of the surrounding steam. Have your shotgun or flamethrower ready.
Proceed to the open shaft and go the submerged duct below. Follow your team and make your way to the ramp leading back to the deck. Enter the only doors ahead to find a stairwell. Continue a bit and watch a part of it collapse. Carefully step on the wreck, but instead of following your teammates, turn to the left to find a full armor, ammo and a dog tag.
Continue to the bottom of the stairwell and head to the next room. Proceed to the next catwalk where more xenos await. In the next corridor as soon as the steam blows, anticipate a couple of xenos charging in. Blow them out then proceed to the cargo bay. Head to the next door and follow your teammates until they stop in the next air control door.
Kill the xeno waiting behind the door and proceed to the next hallway where more PMCs and xenos are engaging. Kill them all and proceed to the next blast door. Wait for the lift to go down then hop on it and pull the lever. After reaching the upper level, don't leave immediately. Check the floor behind the large container to your left to find the mission's last dog tag.
Exit through the next door to reach the drop ship. Repel the initial wave of enemies on the ground then make your way to the upper catwalk and arm the emergency release control.
Fight your way to the control room and kill the heavy gunner there. Operate the terminal to move the cargo container. Exit the control room and go straight ahead to reach the other emergency release terminal. Arm it and board the drop ship to complete the mission.