3 Dog Tags
Clear the guards then head to the next door. Disarm the turret and cut open the door. Proceed inside and fight your way to the lift. You still have to restore power to the lift so head inside the room to the right. There's a lurker camouflaged on the infestation on the wall so don't get caught off guard. Head to the lever and cut the infestation to pull the lever down to restore power to the lift. Regroup with the others and push the button to activate the lift.
Get off the lift and continue along the hallway again until you reach the maker remains. Kill the xenos along the way; as usual, be careful of the camouflaged lurkers on the walls and ceilings. Follow the walkway, past the tent to the left and two cocooned scientists. Before moving forth, check the box in the corner of the catwalk past the second scientist to get the mission's first dog tag.
Continue following the path until you reach the exit. You'll find more enemy forces ahead. Clear them out first and you'll have to destroy the AA guns next. Take the path to the left to find the RPG beside an APC. Equip it and fire at the AA gun until it is destroyed. You can get a fully loaded RPG by dropping the used one and picking up a new one from the same spot again.
Head to the lift and use it to proceed. Fight your way through enemy forces until you're able to regroup with your allies in the next position. Look on the ground near the forklift to find another dog tag.
Clear the area then enter the nearby control room to find the RPG there. Destroy the next AA gun then continue forth until you encounter a small outpost. Take out the PMCs and the xenos to proceed to the next AA gun.
Head to the right to find a container van containing a lot of weapons. You'll also find the game's last legendary weapon there. (Frost's Flamethrower) You can equip the RPG and use it to easily eliminate the guards in the area. Take out the AA gun afterward.
Head where the allied dropship crashed. Fight through more xeno ambushes and go through the wreckage. Once exit the wreckage, you'll find your downed allies. Check the ground beside them to find the last dog tag in the mission.
Kill the xenos until the Queen arrives. Run to the container van and stay there. Take out the lesser xenos and use your movement tracker to anticipate which side the Queen will peek and attempt to grab you. Wait until the mission updates and the Queen leaves.
Continue forth and fight your way through the cargo hold. Once you've reached outside again, grab the smart gun beside the APC under the ship to the left. Fight your way through more xenos and clear the ramp leading to the FTL as it starts to lift off. Wait for a few moments after the dropship arrives and the mission will be complete.