One thing becomes clear as your work your way through Alien: Isolation - there's a lot of crew members who are missing and unaccounted for. By finding their dropped ID tags, you can start filling in your personnel log and discover who they all were.
There are 50 ID tags in total to pick up, and you'll need all of them to unlock The Taken Achievement or Trophy. Some of these are pretty well hidden, but you can ensure you complete your collection by following our guide.
Mission 2 - Welcome to Sevastopol
Sevastopol Spaceflight Terminal Security: After climbing through the vent in the Cells, grab the ID by the body.
Sevastopol Spaceflight Terminal Freight Shipping: After you first equip your flashlight to look for the vent entrance with Axel, go through the first doorway on your left then look in the vent on the left hand side.
Mission 3 - Encounters
Lorenz Systech Spire Upper Level: In the Lobby with the elevator up to Seegson Communications, look behind the counter in the centre of the area.
Lorenz Systech Spire Lower Level: While searching Tech Support for a new data cell, after you get the keycard from Facility Control and open the door up the stairs, check the desk on the right of the room you enter.
Lorenz Systech Spire Lower Level: After collecting the Level 1 Security Access Tuner, return to Tech Support and unlock the room down the side corridor then check on the desk inside.
Mission 4 - Seegson Communications
Seegson Communications Observation Deck: After emerging from the vents and being told to Gain Access To The Elevator, enter the doorway by the body then go up the stairs on your left and look on the bench at the top.
Seegson Communications Observation Deck: Once you cut through Comms Control to search for alternative external communications, head into the smaller room off the following corridor with a downed Working Joe in it and use the rewire panel to unlock the Int. Access door, then go to the end of the next corridor and enter the now open room.
Seegson Communications Monitoring Rooms: When you return to the Monitoring Rooms, head through the room filled with computers on the right of the corridor then look on the bench in the attached room.
Seegson Communications Monitoring Rooms: Moving on from the previous ID tag, head into the Relay Facility and check the bench at the side.
Mission 5 - The Quarantine
Sevastopol Scimed Tower Transit Station: As soon as you exit the transit at the start of the mission, turn left and look on the seating.
San Cristobal Medical Facility Crisis Stabilization Unit: After speaking to the doctor, turn around and crawl through the vent to enter an Assessment Room then look on the desk to your right.
San Cristobal Medical Facility Crisis Stabilization Unit: After entering the Nurse Station with keycode 1702, go through to the next room and check on the desk.
San Cristobal Medical Facility Crisis Stabilization Unit: Use keycode 1702 to unlock the door south of the day room, then follow the corridor around to the Staff Quarters and look on the side.
Mission 6 - Outbreak
San Cristobal Medical Facility Maintenance and Morgue: After restoring the coolant and entering the now open mortuary room, use the rewire panel to open the vent and a drawer will open to reveal this tag.
San Cristobal Medical Facility Primary Care Floor: Once you use the keycard to advance through the Facility Administration, follow the corridor around to the right then look in the room on your left by a wheelchair.
San Cristobal Medical Facility Primary Care Floor: Once you reach the Operating Theatre, check the hanging units at the head of the bed.
Mission 7 - Seegson Synthetics
Seegson Synthetics Synthetic Storage: At the start of the mission, head through the vent then go to the end of the next corridor and look on the floor near the body.
Seegson Synthetics Synthetic Storage: In the room off Synthetics Storage where you upgrade your hacking tool, check the floor by the body.
Mission 8 - Haven
Sevastopol Scimed Tower Maintenance Deck: When trying to reactivate the transit system, look in the corner of the control room under a chair.
Sevastopol Scimed Tower Transit Station: After using the gas torch to cut through the panel, go down the ladder then check on the desk at the opposite side to the vent.
Solomans Habitation Tower Galleria Upper Concourse: When you take the transport at the end of the level and head towards the Colonial Marshal Bureau, turn left instead at the fork in the hallway then follow the left-hand wall to the upper concourse and check the bench at the side.
Mission 10 - The Trap
Solomons Habitation Tower Galleria Lower Concourse: At the east side of the opening area, head into the side room and look on the side by the window.
Lorenz Systech Spire Upper Level: BEFORE INITIATING THE FIRST LOCKDOWN head into Seegson Security, turn left then look on the bench inside the cell on your left.
Lorenz Systech Spire Upper Level: After you go into the Server Farm, head into the side room to the north and check the bench on the side.
Gemini Exoplanet Solutions Upper Floor: From the Ore Processing area, take the ladder up then head left to the Analysis Lab breaker switch area - follow the blood stains into the vent to find a body.
Project KG348 Upper Decks: At the opposite end of the corridor to the Research Labs access, head into the Decontamination Room then check on a bed in the side room with a man crouched in the corner.
Mission 11 - Hazard Containment
Solomons Habitation Tower Galleria Upper Concourse: After you go through the tunnel to reach the Plant Room, look on the nearby desk with a covered terminal.
Solomons Habitation Tower Galleria Upper Concourse: Once you have to find an alternative route to the marshals, go up several sets of stairs then look on the bench to your right at the far end before you go out to the balcony.
Mission 12 - A Synthetic Solution
Seegson Synthetics Seegson Synthetics Administration: After climbing up to the next area and passing through Android Disposal, head to the end of the curved corridor and enter the side room with covered computers, then check on the desk at the back left.
Seegson Synthetics Android Orientation: After climbing across the plant room and entering the next area through the door past the save point, head through the rooms full of androids and security cameras (creep to avoid detection) into the end office then open the floor hatch and follow the vent to the east end.
Seegson Synthetics Android Orientation: Once Samuels gets you access to the private transit, backtrack down the corridor and hack the access panel on the right to access a side office, then look on the floor straight ahead.
Mission 13 - Consultation
Apollo Core Apollo Welcome Area: At the start of the mission, exit the transport then enter the security room on the left and look on the desk.
Apollo Core Apollo Servers And Observation: After passing through the conduit to the servers and collecting the gas mask, go through the door marked Left Hemisphere Servers then enter the room on the left and look on top of the crate.
Apollo Core Apollo Servers And Observation: Take the east exit from the Left Hemisphere Servers then follow the corridor to the next room and look on a control unit to the side.
Apollo Core Apollo Servers And Observation: As you enter the Apollo Human Consultation Control Room, look on the floor by the doorway.
Mission 14 - The Descent
Engineering Central Reactor: After you recover your weapons at the base of a ladder, check on the shelves to the left hand side.
Engineering Central Reactor: On your way to the Engineering Transit Station after activating the purge, duck into the Central Reactor side room on the right and look on the desk.
Mission 15 - The Message
San Cristobal Medical Facility Primary Care Floor: In the area where you upgrade your Security Access Tuner so you can board an ambulance shuttle, look on the floor in the northwest corner.
Mission 16 - Transmission
NOTE: Collecting the following tags requires backtracking across various areas of the game, and this mission is the best time to do it.
Lorenz Systech Spire Lobby And Technical: After opening the door with your Ion Torch, turn right and take the lift to Lorenz Systech Spire. Once there, turn right and go up the stairs then down into the seating area and hack the door. Inside, check on the table.
Travel to Solomons Habitation Tower - this can be accessed through Scimed Tower transit to Engineering Decks, then another transit to Solomons Habitation Tower.
Solomons Habitation Tower Galleria Lower Concourse: When you arrive in Solomons Habitation Tower, turn left and head up the stairs past the save point, then use your Security Tuner to hack the locked door on the left. Once inside, look on the computer bank on the far side of the room.
Once you’ve finished all your collectibles backtracking, it’s easiest to Load Mission Save for Mission 16 and continue from that point.
Seegson Communications Monitoring Rooms: When you reach the early corridor with a flaming android, use the Ion Torch to remove the panel on the left then crawl through the vents to the next room. Go left and up the short stairs then turn right and check on the seat next to the body.
Seegson Communications Observation Deck: After you take the lift down to the EVA Preparation area, look straight ahead to see this tag hanging on the wall ahead.
Mission 17 - Desolation
Solomons Habitation Tower Upper Transit: After using the transit to reach this second area of the mission, go straight ahead to the far side of the area and down the small stairs then look on the seating.
Lorenz Systech Spire Upper Transit: After restarting the generator and entering the Living Area south of the Rec Room, look on the bed in the side room before using the vent.
Mission 18 - Tomorrow, Together
Station Maintenance Lower Deck: When you reach the Tow Platform Dock Control and are tasked with activating the systems, look between the two objective markers on your map to find this tag on a table next to a body.
Station Maintenance Upper Deck: After being captured and freeing yourself from the wall, grab this final tag from the seating to your left.