There are 35 Dataslates in Warhammer 40k Space Marine 2. Finding all of them unlocks the Data Mining trophy & achievement. If you miss a Dataslate you can still replay the missions later at any time. You can use the game’s objectives for orientation, which can be seen by pressing Touchpad (PS5) / Menu-Button (Xbox).
To view which Dataslates you are missing, press Touchpad (PS5) / Menu-Button (Xbox) while in the Battle Barge (hub area) and click on “Dataslates Repository”.
Video Guide
Campaign Missions (Main Missions)
Campaign Mission 01: Skyfire – 4 Dataslates
Dataslate #1: Stormtalon Crash, Kadaku
Objective: Make Your Way Through the Swamp
At the start of the swamp area, stay to the left of the mission objective “Make Your Way Through the Swamp”. Shoot the exploding plants on the left to reveal a secret path. Follow the path to the dead-end to get the dataslate.
Dataslate #2: Admission of Desertion
Objective: Make Your Way Through the Swamp
Shortly after kicking through a small wall where you have to hold 
/ 
, follow the path until you have to drop down a broken metal bridge. Then go up the path and drop down the right of the large metal tower. The collectible is in front of the large tree root. Just before dropping down a ledge where human soldiers wait for you (can’t go back after dropping down the ledge, so get it before this).
Dataslate #3: Anti-Tyranid Offensive, Kadaku
Objective: Navigate Through the Base
Shortly after entering the base when you arrive in the tunnel, DON’T follow the main path to the objective “Navigate Through the Base” but keep left until reaching the dead end. There is the collectible.
Dataslate #4: Desired Purgation of Data
Objective: Reach the Targeting System
The last collectible is on the table to the right of the elevator, BEFORE using the elevator.
Campaign Mission 02: Severance – 4 Dataslates
Dataslate #5: Conflict, Adeptus Astartes/Tyranid, Kadaku
Objective: Reach the Adeptus Mechanicus facility
After you have to kick through the first wall of this mission with (PS5) / (Xbox), go past the white tent in front of you and up the slope where a bunch of enemies spawn, then go left to find this behind a broken military car.
Dataslate #6: Tyranid Attack, Designation: Rippers, Kadaku
Objective: Locate the Transmitter
BEFORE using the first elevator in this mission, check to the left of the elevator where a red light is. Just after leaving the jungle and entering a military facility.
Dataslate #7: Lamentation for Sacred Machines
Objective: Locate the Transmitter
After the room where you must use a flamethrower to chase away rats and reboot the power, you will enter the door that says “Sector 614” above it. In the next room interact with the switch on the left to open a door, go through it and follow that path to find the dataslate at the end.
Dataslate #8: Summary, Tyranid Invasion, Kadaku
Objective: Reach the Crash Site
The next collectible is during the ‘Reach the Crash Site’ objective. Here you have the jetpack for the first time, which is needed to collect the next collectible. As soon as you enter the first little cave tunnel, fly upwards with the jetpack to the upper cliff. The next dataslate is at the top.
Campaign Mission 03: Machinus Divinitus – 3 Dataslates
Dataslate #9: Attempted Liturgy for Burnt Capacitator
Objective: Proceed to the Elevator Control Room
After the first wall where you have to hold (PS5) / (Xbox) to lift the wall, you will go up a big rooftop. Immediately after the long rooftop is a console marked as the main objective you have to interact with to extend a bridge. Then you must hold off enemies until the bridge is fully extended. Then go over the bridge into next building, go left, there on the roof sits the dataslate.
Dataslate #10: Termination 101010-S
Objective: Proceed to the Databanks
Immediately when getting the objective ‘Proceed to the Databanks’, you will need to interact with a wall panel to open a door labeled “Sector 5” to enter the tunnels of a facility. From this door follow these directions: Take first left, right, right, left, right – this leads to a dead-end where you find the dataslate. It’s opposite the main path.
Dataslate #11: Improper Command
Objective: Proceed to the Databanks
After defeating the Carnifex boss, go through the next area and you’ll reach a long metal bridge (mandatory story path). After going over the metal bridge you have to interact with a wall panel, then fend off enemies while you wait for a gate to open. After this door opens, go straight ahead to the end of the corridor, in the right corner is the dataslate. Make sure you grab it before you proceed to the “assemble” objective on the elevator.
Campaign Mission 04: Servant of the Machine – 2 Dataslates
Dataslate #12: Cannon Maintenance, 1.002.81
Objective: Advance to the Neurothrope’s Locus
After the first elevator ride in this mission, exit the elevator and go around the left to find the dataslate behind the elevator.
Dataslate #13: Tithe Collection, Avarax
Objective: Advance to the Temple of Thassean (*when you get this objective for the second time, after objective ‘Cover Chairon’ and ‘Regroup with Chairon’)
Immediately after you finish the objective ‘Regroup with Chairon’ you get a cutscene. Then the objective ‘Advance to the Temple of Thassean’ continues. Where you spawn you’ll see a huge statue of a winged creature with a spear and a blue bubble force-shield around it. Go down the only rubble-path in front of you, before taking a left turn check the alcove at the very end where some rubble is. Just before you have to interact with a wall panel to open a metal door.
Campaign Mission 05: Voidsong – 3 Dataslates
Dataslate #14: Potential Heresy, Adeptus Astra Telepathica, 2287.8
Objective: Restore Power to the Door
After you have to interact with a wall panel to open a big red metal door, you will enter a building and must go through some tunnels. Take the first path right, then always go left until you reach the dead-end to find this in the corner of the area on a desk. It’s to the left of the big door you must restore power to (which is the main objective).
Dataslate #15: Potential Heresy, Adeptus Astra Telepathica, 2228.2
Objective: Advance to the Relay Entrance
About halfway through the objective ‘Advance to the Relay Entrance’, after a huge fight where you can use the jetpack to reach enemies on platforms, you will have to interact with a wall panel to open a big metal gate. In the area immediately after the door, use jetpack to jump up the destroyed balcony on the right side.
Dataslate #16: Potential Heresy, Adeptus Astra Telepathica, 2289.5
Objective: Transmit a message to Lord Calgar
After a boss fight while defending the relay, you will have to enter an elevator. After the elevator ride, go down the stairs in front of you where you see 3 humans spraying flamethrowers on corpses. To the right of them in the corner behind the stairs is the dataslate.
Campaign Mission 06: Dawn’s Descent – 4 Dataslates
Dataslate #17: Effects of Noctillith Exposure
Objective: Advance to the cathedral
After you have to interact with a yellow orb on an altar, a floating platform will come flying down. This will start the objective ‘Advance to the cathedral’. Jetpack up to the platform that came flying down, then jetpack up the next two cliffs until you reach the cathedral, Before jetpacking up the cathedral building, check the left corner.
Dataslate #18: Tomb Excavation, Analog Backup Log 8.6
Objective: Advance to the Mechanicus Facility
After you have to defend your position in the cathedral, you will get a cutscene and you respawn in a new location that looks like a cemetery. Immediately after you spawn, go down the path to your left, then keep taking the leftmost path until you reach a dead-end where you find the dataslate between a crypt and a statue. In the last corner of the left path, it will emit a green glow.
Dataslate #19: Tomb Excavation, Analog Backup Log 8.7
Objective: Explore the Ruins
About 10 minutes into the Ruins, after you have to interact with one of the yellow orbs on an altar (not the first one in the ruins). Enter the next room after this, you will see a sorcerer type enemy floating in the air, where lots of wires are hanging from spotlights. Go up the stairs to where the sorcerer / wires are, here turn left to explore the side area for this dataslate. For the story you’d have to take the right path where the wires lead, don’t go there yet. (Don’t drop down to the room with the elevator yet, if you reach the elevator you went too far)
Dataslate #20: Tomb Excavation, Analog Backup Log 9.9
Objective: Advance to Aurora
During objective ‘Advance to Aurora’, after you have to push the first yellow crate that blocks the path with (PS5) / (Xbox). Defeat the next group of enemies, then take the path on the right through what looks like a blue-glowing thorns, then turn right to find this on the ground. In front of what looks like a big head of a bug robot.
Campaign Mission 07: Bellum Sempiternus – 3 Dataslates
This mission starts automatically after “Dawn’s Descent” if you’re on the first playthrough.
Dataslate #21: Effects of Warp Exposure
Objective: Seek Out the 2nd Company Position
Shortly after getting this objective you will walk past some friendly soldiers, then on the story path you have to drop down a ledge. After dropping down, go left, then turn right to find this dataslate at the end of the path on the ground. (opposite the story path which requires you to go right, just before triggering objective ‘Regroup with Acheran’)
Dataslate #22: Burial, Adeptus Astartes, Salamander Chapter
Objective: Advance to the Second Force
After having to interact with a wall panel to open a door, you will enter a circular arena and must fight a group of enemies that includes a sorcerer. After this, you enter a room that has a sarcophagus in the middle. In the back left corner of this room is the dataslate.
Dataslate #23: Amount of Deceased on Demerium
Objective: Advance to the Obelisk
The next collectible is on the way to the goal “Advance to the Obelisk”. As soon as you cross the blue glowing tunnel, keep to the right and come directly to the last dataslate.
Note: The last campaign mission “Duty Without End” doesn’t contain any dataslates.
Operations (Side Missions)
When back in the hub area, interact with the data terminal to the left of the carrier ship to start Operations. They are repeatable side quests.
Operation 01: Inferno – 2 Dataslates
Dataslate #24: Amelioration of Improper Ordnance Storage
Objective: Reach the Astra Militarum Camp
At the very start of this Operation, go down the slope in front of you, then at the end of the area take the right path. Now stick to the far right side of the path until you reach a bunker building. Go inside this bunker to find the dataslate at the end of it.
Dataslate #25: Admiration of Promethium
Objective: Advance to the Observation Platform
The next collectible can be found on the main path when following the objective ‘Advance to the Observation Platform’. Just after triggering this objective, you must use a terminal to open a door and drop down a ledge, then go through a corridor. After the corridor you can see a bridge at the end of the room. Go up a ramp on the left (main story path), at the top you find the dataslate in an alcove on the left. Where a white number “2” is painted on the wall. Must collect it BEFORE dropping down to the bridge and using the elevator.
Operation 02: Decapitation – 2 Dataslates
Dataslate #26: Final Sermon
Objective: Proceed to the Bridge Tower
Shortly after the start of the chapter when you enter a big cathedral, go upstairs. On the upper floor, enter the hallway where lots of enemies are, check the left side of the hallway. (before dropping down the ledge on the upper floor)
Dataslate #27: Bridge Construction, Overseer Commentary
Objective: Pursue the Hive Tyrant
About a minute after an elevator ride, you go inside to a tunnel area with big propellers on the sides. After clearing out the first group of enemies in the tunnels, check the right corner for the collectible.
Operation 03: Vox Liberatis – 2 Dataslates
Dataslate #28: Creation of Daemonhost, I
Objective: Find a Way to Take Down the Warp Shielding
After the first elevator ride in this operation, take the right path (before going through next gate in front of you). At the end of the path is the dataslate.
Dataslate #29: Creation of Daemonhost, II
Objective: After finishing objective ‘Activate the Elevator System Consoles 2/2’
After activating the two Elevator System Consoles, assemble with your team at the round elevator in the middle and activate the elevator. After riding the elevator down to floor “01” (the floor number will be on the wall), turn to the right to find this dataslate on a shelf. BEFORE interacting with the yellow orb that’s straight ahead from the elevator.
Operation 04: Reliquary – 2 Dataslates
Dataslate #30: Servitor Greeting, Demerium
Objective: Proceed to the Warp Beacon
After having to interact with a console to open a gate, you will enter a room where you are supposed to interact with a green-glowing computer console in the middle of the room. To the left of this go up the stairs to find the dataslate upstairs.
Dataslate #31: Heretic Attack, Demerium
Objective: Proceed to the Warp Beacon
After the objective ‘Return to the Main Hall and Unseal the Tomb’, you will retrigger the objective ‘Proceed to the Warp Beacon’. After you take the next elevator, you come to an area where a flying dragon spews fire on the ground. Enter the next building that looks like a cathedral. In here turn right to enter the balcony, the dataslate is on there.
Operation 05: Fall of Atreus – 2 Dataslates
Dataslate #32: Unauthorized Override Attempt
Objective: Proceed to the Mechanicus Compound
After you finished the objectives ‘Follow the Dreadnought’ and ‘Clear the Passage’. Immediately after you ‘Clear the Passage’ a stone will lift and you can drop down to a floor below. Here turn around to find the dataslate in the back of the room, opposite the story path (don’t yet interact with the rubble that’s blocking the path forward).
Dataslate #33: Status Battle Barge, Sword of Atreus
Objective: Proceed to the Mechanicus Compound
When you must go up multiple metallic ramps on a tower-like structure, it’s found in an alcove on the left.
Operation 06: Ballistic Engine – 2 Dataslates
Dataslate #34: Missing Servo Hauler
Objective: Proceed to the Militarium Depot
After you have to interact with a wall panel to open a big gate, take the right path and enter the first opening on the right to find it on a table.
Dataslate #35: War Preparation, Avarax
Objective: Advance to the Train
This objective takes place over two parts. After this objective gets briefly interrupted by another objective ‘Clear the Freight Way’, it will retrigger the objective ‘Advance to the Train’ for a second time. From the control room where you did the objective ‘Clear the Freight Way’, drop down the next two platforms. Then you arrive in the area with the dataslate. In the back of that area check next to the tank that’s parked there.
That’s all of the 35 dataslates in Space Marine 2.
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