The Callisto Protocol 100% guide

The current Xbox achievement list contains 46 achievements worth 1,540G:

• Base game: 26 achievements, 1,000G.
• New Game+ update: 1 achievement, 20G.
• Hardcore update: 3 achievements, 60G.
• Contagion Bundle: 2 achievements, 100G.
• Riot Bundle: 7 achievements, 180G.
• Final Transmission: 7 achievements, 180G.

This guide targets the shared achievement list used by Xbox One, Xbox Series X|S, and Xbox-enabled Windows. All 46 achievements are single-player and can be earned without multiplayer or co-op.

As of 2026-10-13, no achievement is unobtainable or discontinued. The latest published official patch notes are for v5.04 (July 2023). Achievement tracking is CURRENTLY COMMUNITY-FLAGGED / BUGGY, particularly across Contagion, Hardcore NG+, Final Transmission, and some end-of-run triggers.

The practical completion route is:

1. First campaign on Maximum Security: collect all 43 Data-Bios and the three optional weapon schematics, visit both Kallipolis secret rooms, and earn every base-game miscellaneous achievement.
2. Second campaign: regular New Game+ on Minimum Security. Finish it and buy as many remaining upgrades as possible for Armed to the Teeth.
3. Continue into a partial second New Game+ only if you need more credits for the final upgrades.
4. Third full campaign: fresh Hardcore Mode.
5. Fourth full campaign: Hardcore Mode NG+.
6. Fifth full campaign: fresh standard Contagion Mode without dying.
7. Riot Mode: a short first run for Hoard Mode, Instigator, and the perks, then a Wave 50 run.
8. Final Transmission: one playthrough, collecting all eight Protocol Data Drives and its missable side objectives.

Start the first campaign on Maximum Security and never lower the difficulty during that run. Switching to Maximum Security near the ending was patched out and is not reliable.

During the first campaign, also pick up the three optional weapon schematics: Skunk Gun, Tactical Pistol, and Assault Rifle. They are easy to walk past and are required for Armed to the Teeth.

Do not play the campaign completion in Dismemberment Mode. It disables campaign achievements.

There is no chapter select. The completion-sensitive collectibles are:

• the 43 Data-Bios
• both Kallipolis secret rooms
• the eight Final Transmission Protocol Data Drives
• the Escape Pod detour
• the Hammer Crates

Treat chapter transitions as cleanup points, and collect everything listed before advancing rather than relying on later recovery.

Achievement failures are inconsistent rather than universal. Most players can still unlock the list normally, so use the normal trigger first and preserve recovery options instead of applying elaborate workarounds preemptively.

Use rotating manual saves throughout the base game, New Game+, Hardcore, and Final Transmission. Keep an especially useful save immediately before the end of each campaign mode, and before the final collectible or upgrade that should trigger an achievement.

Contagion does not provide manual saves. A death returns you to the beginning of the chapter, but for You Belong Here the death itself counts immediately. Restarting the chapter from the menu before Jacob takes a lethal hit does not count as a death. Once a death animation begins, treat the run as lost.

Keep your completed base-campaign save in its own slot before starting Final Transmission. Final Transmission autosaves have been reported overwriting a completed campaign slot.

Avoid Quick Resume when you are approaching an important end-of-run achievement. A full game restart between modes is a cheap precaution. If achievement tracking seems wrong, a useful troubleshooting step is to check that the Krafton ID page in the game loads normally and your Krafton ID is linked before committing to another long run. It is not a guaranteed cause or fix.

Do not delete saves as a first-line fix. The route below avoids destructive save-deletion workarounds.

Your first campaign is the Maximum Security run. Search side rooms thoroughly, stomp corpses for resources, sell valuables, and begin saving credits rather than spreading upgrades across unnecessary weapons.

Data-Bio numbers in this guide match the order of the in-game Data-Bios menu. In a few chapters the route collects them out of menu order, and each list says so. Locations reflect the current layout after the June 2023 patch, which moved 11 Data-Bios.

• Data-Bio 1 (Jacob Lee, "Jacob's Job"): as soon as you control Jacob, leave the cockpit and take the first door on the left, marked "Unlocked". The log is in the locker beside the bunk. You cannot return once you leave the ship.

Continue until Elias helps Jacob and provides the shiv.

This chapter introduces several systems needed for cumulative achievements.

Collect the first four Data-Bios before taking the GRP:

• Data-Bio 5 (Sgt. Eric Jane, "Locked Door"): after the vent from Recreation A225, harvest the corpse at the feet of the damaged security robot. The story needs it to open Laundry B202.
• Data-Bio 6 (Ofc. Pruitt Matos, "Laundry"): inside Laundry B202, take the right-hand door at the fork. Go down the ramp and through the washing-machine room to Office B112, then harvest the corpse at the back of the office.
• Data-Bio 7 (Duncan Cole, "Secret Room 1"): back at the same fork, take the left-hand door toward Maintenance. Follow the vents, go down the stairs, and drop through the hole. In the rock-walled underground, go through the cracked-open vault door into the first Kallipolis secret room. The log is on the table at the back. Entering this room is the first half of The Commonality. Do this before heading to Medical Ward C101.
• Data-Bio 8 (Dr. Ewan Hayes, "MedLab Outbreak"): in Medical Ward C101, harvest the doctor's corpse on the floor directly in front of the doors. This comes before you get the GRP in Operating C104.

Continue the story through the SHU sequence.

Collect the first four Habitat Data-Bios on the way to the pipeslide:

• Data-Bio 13 (Dr. Caitlyn Mahler, "Corruptors"): at the Purification B H207 door, climb the movable crate onto the small balcony with the resource chest. The log is on the box beside the chest. If the balcony has only the chest, climb the two ladders by the spike grids to the right and check the container at the far end of that catwalk. Take it before crawling into the vent left of the H207 door.
• Data-Bio 14 (Ofc. Bruno Vorenus, "Crosswired"): through the vent left of the H207 door, place both Gate Fuses in the dark room. After the fight, harvest the officer's corpse beside the door to Access Hall H271.
• Data-Bio 15 (Dr. Jae Moon-Bell, "Cocoons"): after placing the Gate Fuse at Access Hall H206, do not enter Water Control H262 yet. Continue down the corridor, shiv the locked door panel, and follow the route to an unlocked door across from a Health Injector. Move the Gate Fuse from the box inside to the fuse box by the next locked door (the Storage Hall H239 route). Pass through the decontamination curtains into the doctor's lab; the log is on the floor in the far corner, by the corpse on the gurney. Put the fuse back on your way out.
• Data-Bio 16 (Ofc. James Reese, "Suicide Guard"): after using the Water Control console, the "Get Code from Guard" objective leads to Utility F265, which has "SHOOT THE TENTACLES" written in blood. Kill the ambusher and interact with the guard in the chair. This is required by the story.

Finish the water-control objective and proceed into the pipeslide.

After the pipeslide, extend the bridge toward Oxygen Processing.

A security robot also patrols this section. If you did not destroy the Aftermath robot for Terminated, this is your last reliable chance.

If you missed the Skunk Gun schematic in Aftermath, pick it up here. In Oxygen Processing H623, take the left door into Botanical H624 and continue to Utility Hall H626. Turn right and squeeze through the gap; the schematic is on a crate. This is the same detour as Data-Bio 17 below.

Collect the remaining Habitat Data-Bios. Do 17 and 18 in that order, both before entering the code at the Tram Security console:

• Data-Bio 17 (Ofc. James Reese, "Security"): in Oxygen Processing H623, take the left door into Botanical H624. Fight through the aeroponics room to Utility Hall H626 and climb the stairs, then squeeze through the narrow gap on the right. The log is on the crate beside the corpse.
• Data-Bio 18 (Sgt. Bill Pekelo): back in H623, take the right door to H625. Break into the dark side room for its Gate Fuse and place it in the door you came through. Climb the crate in the corridor and crawl through the vent; Pekelo's corpse is in the room beyond, as the second "Get Code from Guard" objective. This pickup sometimes fails to register, or un-registers if you die before the next checkpoint. Make a manual save before the vent. After harvesting, open the Data-Bios menu and confirm Pekelo is filled in; if it is blacked out, reload and repeat. Check again after the next checkpoint.
• Data-Bio 19 (Ofc. Kyle Serra, "Evacuation"): in Utility H630, go left to the door of Hall H631 and open its panel. Defeat the three enemies (one is a Spitter). The log is on a small container at the far end, across from the Tram Depot Entrance door. Collect it before going down the hatch in the back-right corner of Utility H630. Afterwards, confirm Serra is filled in on the Data-Bios menu.

The large grinder room shortly afterward is another excellent place to finish Chew 'Em Up and Get a Grip. GRP enemies directly into the machinery until both cumulative achievements are complete.

Explore the first buildings after reaching the surface.

• Data-Bio 20 (Miranda Kristofich, "Terraforming"): after opening the first gate, walk straight past the C2 Surface Exploration door to the small buildings at the end of the area. Enter the building on the left; the log is on the shelf on the left. Do this before going through C2.
• Data-Bio 21 (Richard Cids): after the trapped-worker horde, go to the door with orange lights above it. Kill the enemy that breaks through, then harvest the maintenance worker's corpse inside. The objective requires it.
• Data-Bio 22 (Dr. Caitlyn Mahler, "Combustors"): in the tunnels, after crawling under the debris, take the left door at the first split under the orange light. The log is on a small table. You can go right afterwards.
• Data-Bio 23 (Lt. Devon Wayne, "Close the Gate"): after Dani gives you the Riot Gun, go up the stairs into the Gate Control area. Harvest the corpse on the floor beyond the cafeteria tables; it provides the gate code.
• Data-Bio 24 (Ofc. Aaron Taycho): in Prisoner Transfer S408, harvest the corpse jammed in the spinning machinery at the far end. Harvesting it re-arms the traps and triggers a horde, so make a manual save first and GRP enemies into the blades.

This chapter introduces the Blind enemies. They are ideal for the five required backstabs.

• Data-Bio 28 (Dr. Sheehan Yune, "Field Log 1"): after cutting yourself free and killing the first Blind enemies, the next room has a doorway marked L1 CMV Maintenance 2A. The log is on the workbench beside that doorway; check both sides.
• Weapon schematic: from the Field Log 1 room, take the left story path. After two enemies burst from the walls, enter the small locker room on the right and take the Tactical Pistol schematic from the desk. If you miss it, it appears again later in the run, in the Midtown clinic in Colony and near Jacob's cell in Tower.
• Data-Bio 29 (Dr. Sheehan Yune, "Field Log 2"): past the Blind-filled room, go left down the corridor behind the orange-lit doorway. The log is on the crates at the end.
• Data-Bio 30 (Dr. Sheehan Yune, "Field Log 3"): after opening the Power Tunnels with the keycard, do not drop down the main path at the first split. Take the lit side tunnel on the right (Hard Hat Area) to its end, and harvest the officer's corpse beside the resource cache. Treat the drop as one-way.

During the "Locate the Power Reactor" objective, squeeze through the wall gap and climb the ladder to the reactor level.

At the top, do not go right into the reactor Control Room. Crouch through the crevice straight ahead, beside the white chalk symbol. Follow the cave down to the gate with the golden symbol, turn right, and squeeze past it into the hidden room. Kill the ambusher.

• Data-Bio 31 (Yannick Sage, "Secret Room 2"): on the table at the far end of the second Kallipolis secret room. Leave by the left-hand route.

The Colony contains seven Data-Bios. Collect the first six as you move upward through the settlement; the seventh comes after the laboratory.

• Data-Bio 33 (Alex Wang, "Miner Log 1"): as the chapter begins, go down the short stairs and turn left. The corpse is on the path just before the cave entrance.
• Data-Bio 34 (Derryn Barr, "Miner Log 2"): after Dani asks you to meet her at the light tower, enter the room on the left beside the crooked shipping container. The log is on the shelf beside the downward ladder; take it before climbing down.
• Data-Bio 35 (Derryn Barr, "Miner Log 3"): climb the ladder with the MIDTOWN sign. At the top, turn right and go through the door marked "Unlocked". The corpse is in the back room, guarded by a Blind enemy. If it is not there, check the house on the opposite side.
• Weapon schematic: pick up the Assault Rifle schematic from the restroom beside the General Store.
• Data-Bio 36 (Yannick Sage, "The Mole"): after using the keycard and riding the elevator up, harvest the corpse directly in front of you as you step out.
• Data-Bio 37 (Buidhe Reddwork, "HighTown"): go up the stairs from the elevator. Before the sign pointing to Bathroom and Roof Top, enter the first shipping-container house on the right and harvest the corpse.
• Data-Bio 38 (Ji-Kwan Park, "Miner Log 4"): use the Gate Fuse on the Rooftop door and enter the Reforge room. Check the floor right beside the Reforge, in front of the short ladder. If the corpse is not there, climb the ladder and check the top. Take it before the ledge route to Dani.

Follow Dani into the laboratory and continue through the story reveal.

Tower begins with Jacob already back in his cell. Collect the final four Data-Bios before committing to the ending:

• Data-Bio 40 (Dr. Tala Ismene, "Observation"): after the first Tower Two-Head, take the Gate Fuse from Server Room B315 and open Panopticon Surveillance B330. Go up the stairs and turn left along the cells, then kill the two ambushers near the end. The log is on a table inside a cell behind a window. If you cannot reach it, smash the glass with melee, or walk to the end of the corridor and back so the enemy inside breaks it.
• Data-Bio 41 (Dr. Tala Ismene, "Taken"): after descending into the Incinerator area, turn left toward Psyc Block 1 A110. The log is on the biohazard container just outside the A110 entrance. Take it before the vent detour for the Gate Fuse.
• Data-Bio 42 (Edward Bates, "Experimentation"): after the later Two-Head, an announcement says the defenses are powering down. Go through the doors marked "Unlocked" at Research Checkpoint R001. The log is on the small metal apparatus on the right, just inside.
• Data-Bio 43 (Duncan Cole, "Cole's Triumph"): after regrouping with Dani, take the elevator up. In the first room, the log is on the table at the far left, by the cherry-tree display.

Before entering the final sequence, make a manual save and keep it after completion. This gives you a clean trigger point if either ending achievement fails to register.

Do not lower Maximum Security.

Start a regular New Game+ from the completed campaign save. Use Minimum Security to make the credit and upgrade run as fast as possible.

Your weapons, upgrades, and remaining Callisto Credits become available again when you reach the first Reforge.

Skip collectibles and miscellaneous work that is already complete. Search containers, stomp enemies, sell valuables, and sell excess ammunition or health when you have more than you need. Credits are the only reason to explore optional resource rooms now.

Check all seven equipment lines at the Reforge. The Stun Baton, GRP, and Riot Gun come through the story. The Hand Cannon, Skunk Gun, Tactical Pistol, and Assault Rifle must be printed, and the last three need their schematics. If a schematic was missed in the first campaign, collect it on this run.

Printing the four purchasable guns costs about 3,200 credits: Hand Cannon 800, Skunk Gun 800, Tactical Pistol 600, Assault Rifle 1,000.

Full upgrades for every line cost roughly 53,500 credits, so plan on about 56,700 credits including printing:

• Stun Baton: 11,700
• GRP: 11,700
• Assault Rifle: 11,000
• Skunk Gun: 6,400
• Tactical Pistol: 5,700
• Riot Gun: 4,200
• Hand Cannon: 2,800

Treat these figures as approximate. Expect the full upgrade requirement to use the resources from most of the original campaign plus at least one New Game+ run.

Hardcore Mode must first be completed as a fresh Hardcore run before Hardcore NG+ becomes available.

Hardcore changes the game in several ways:

• less ammunition and fewer resources, and contraband sells for less
• more incoming damage
• a weaker Baton
• enemies that mutate more quickly

Death does not invalidate the run, so this is not a permadeath achievement.

You already know the campaign route. Ignore collectibles and miscellaneous achievements. Preserve ammunition by using dodges, melee, the GRP, and environmental hazards whenever practical.

Do not try to fund Armed to the Teeth here. Concentrate upgrades on survival: the Baton, GRP capacity or velocity, and one dependable firearm.

Keep a manual save near the final objective before completing the campaign.

After Recidivist, start Hardcore NG+ from the completed Hardcore save. Your accumulated equipment makes this much easier than the fresh Hardcore run.

Again, keep a manual save at the final escape objective before triggering the ending.

Use a fresh standard Contagion campaign for this run as the conservative choice. Contagion New Game+ has also been reported to work for You Belong Here.

Contagion differs from a normal run:

• tougher enemies and scarcer resources
• no manual saves
• a death returns you to the beginning of the current chapter

For You Belong Here, however, a chapter restart after a death is not a recovery method. Once Jacob actually dies, that run no longer counts as deathless. Start a new Contagion campaign rather than continuing and hoping the death will be ignored.

Play conservatively:

• Use GRP hazards and melee to conserve ammunition.
• Avoid optional fights and unnecessary exploration.
• Keep healing items for forced encounters.
• Treat the Habitat pipeslide, the Below Two-Head, later forced Two-Heads, and the final boss as the major run-risk sections.
• Practice any sequence that still gives you trouble on a completed normal save before committing to another Contagion attempt.

Both Contagion achievements remain CURRENTLY COMMUNITY-FLAGGED / BUGGY as of 2026-10-13. Before trying any fallback, check the Krafton ID page in the game and fully close the app; these are troubleshooting steps, not a confirmed cause.

If you finish a genuinely deathless Contagion campaign and neither achievement appears, keep the completed Contagion save at the final escape objective.

On Xbox console, a community-reported workaround is:

1. Make sure the console is already configured as your Home Xbox so the game can launch without a network connection.
2. Fully quit the game.
3. Take the console offline.
4. Launch the game offline and load the completed Contagion save near the final escape.
5. Finish the final sequence while offline.
6. When the ending reaches The Callisto Protocol title logo immediately before the credits, reconnect the console to Xbox services.

This is not a guaranteed fix. Use it only after the normal achievement trigger has failed.

A second, older fallback has worked for some players:

1. Start a new standard campaign.
2. Play into Chapter 2 (Aftermath) until it autosaves, then quit.
3. Start Contagion as New Game+. Both Contagion achievements may unlock during the intro cutscene.

Use two Riot runs:

• Run 1 earns Hoard Mode and Instigator, and unlocks the Riot perks.
• Run 2 goes to Wave 50 for the remaining achievements.

In Run 1, do not spend any Riot Credits for the first five waves. Pick up resources that are freely available, use the Baton heavily, and survive without buying upgrades, health, ammunition, or other items.

Run 2 is the Wave 50 run. Equip the three unlocked perks before starting. Perks unlock from your personal high score and stay unlocked. Reports that active perks block achievements are conflicting, and many players have finished Wave 50 with three perks equipped. If a Riot achievement fails to unlock, check your Krafton ID and retry without perks.

Spend aggressively from the start. Buy a Health Injector each wave, and work through the Riot Gun upgrades, which cost 1,500, 2,400, 3,250, and 4,200 Credits. The Baton plus the upgraded Riot Gun is a simple primary setup, with the Assault Rifle or Hand Cannon as backup.

The fan room is a strong camping position. The upper catwalk and central upper floor also give good sight lines and reduce the chance of being trapped in narrow corridors during later waves.

Do not rely on Quick Resume during this run. Riot achievements have had intermittent tracking problems, so finish the full Wave 50 attempt in one active game session.

Final Transmission follows the base campaign and has seven achievements worth 180G. Play on the easiest available difficulty unless you want more challenge; no achievement depends on difficulty.

The DLC's achievements are CURRENTLY COMMUNITY-FLAGGED / BUGGY. Use rotating manual saves and keep a save before every major missable trigger.

Before starting, make sure your completed base-campaign save is in its own slot. Start Final Transmission from its own main-menu entry.

Early in Mahler's Lab you reach the first Security Lock System.

Continue into the prison-cell area until you take a Gate Fuse from Security Control.

Do not use it on the main progression door straight away.

• Protocol Data Drive 2: turn around and place the Gate Fuse in the Disciplinary Confinement door. Follow the optional path around to the Data Drive on the table.

Retrieve the Gate Fuse afterward and use it to continue through Restricted Access.

After the next forced sequence, Jacob eventually drops through a hole into an infected area.

Find the room containing two power switches and activate both.

Backtrack toward the hole you dropped through. The previously unpowered door there now opens.

• Protocol Data Drive 3: enter the newly powered route, crawl through the narrow opening into the hidden room, clear the Blind enemy, and take the drive from the rear table.

Return to the two-switch room and continue through the narrow gap in the wall.

At the next locked-door area:

• Protocol Data Drive 4: take the door on the right into the side room with the damaged security unit. Clear the ambush and collect the drive from the terminal beside the robot.

Keep moving the Gate Fuse through the required doors until you reach the sewer section.

Clear the Blind enemies in the flooded tunnel and climb the ladder at the far end.

• Protocol Data Drive 5: at the top of the ladder, turn left through the doorway. The drive is on the container on the right.

Continue until the environment begins repeating itself.

Make a manual save before entering the loop. This Isn't About Escape can glitch, and the save lets you replay the detour.

Keep walking through the looping rooms. Each cycle changes the environment slightly. After about six laps, a Gate Fuse appears on a table under a "TURN BACK" sign.

Take it, reverse direction through the loop, and use it on the fuse door that is now accessible.

Continue through Fabrication until the story takes the Stun Baton away and you have to sneak through the Biobot-filled staging area.

After the vent sequence, you reach a room with a Reforge and several Control Room doors.

Enter Control Room Access and squeeze through the gap.

Take the first room on the left to collect a Gate Fuse.

• Protocol Data Drive 7: use that Gate Fuse on the third door on your left along the corridor, and collect the drive inside.

Recover the Gate Fuse afterward and keep using it to open the required progression doors.

The story soon leads to the replacement melee weapon.

Finish the remaining Gate Fuse objectives, and keep a manual save in the final red Reforge room before entering the boss arena.

Use the Kinetic Hammer when the boss commits to melee. During the ranged and teleporting phases, stay mobile around the pillars and shoot the exposed glowing weak points. The Assault Rifle is particularly useful for dealing damage during the ranged windows.