Ad Infinitum: Ad Infinitum 100% Achievements

Ad Infinitum is a mostly-linear psychological horror game with some achievements that are very easy to miss. To unlock all achievements, you will need to complete all three endings which branch from the choices made at the end of each chapter. My guess is that you will need around 8-10 hours to complete all achievements with the help of this guide.

Since the game only has a single save slot and no chapter select menu, the most efficient way to complete all endings is through save-scumming (making a copy of your save folder at a key point, then replacing your existing save folder with the copied folder to revert to a previous point of the game). With this method you will need to complete at least:

• one full playthrough focusing on collectibles and missable achievements
• a continuation starting from the end of chapter 1
• another continuation from the end of chapter 3

By default, the game’s save folder can be found at:

There are many points where you will suddenly be prevented from backtracking, so try to be thorough in your exploration and do things in the order listed in this guide. It’s a good idea to also make regular backups of your save folder in case you miss anything. The game features a generous checkpoint system and all collectibles should be saved as soon as you pick them up, so you likely won’t need to collect them again in the event that you die or need to reload your save.

This guide will be as spoiler-free as possible.

The main objectives to focus on in your first playthrough are:

• Collect all German and French dog tags.
  • German dog tags are often found next to corpses, while French dog tags are often found next to helmets.
  • You can track the amount of dog tags that you’ve collected in the Objectives tab of the in-game menu.
• Read all letters.
  • Though the description of the “All knowing” achievement states “Read all letters,” it seems that you may only need to read a certain amount.
  • It’s also not clear what counts as a “letter,” but you should hopefully have no trouble unlocking this achievement by following the guide. Some examinable objects such as drawings or photographs aren’t documented in this guide, so try to examine everything that you come across just in case.
• Answer all field telephone calls.
  • The six particular calls for the achievement all occur at the non-estate sections of chapters 2 and 3.
• Examine all paintings.
  • All paintings can be found at the opening section of chapter 3, but some can be examined earlier.
• Make a backup of your save folder every time the game states “In this area your actions will have consequences.”
  • The most important backup to make during your first playthrough is at the end of chapter 1 as this will save some time and effort for your remaining playthroughs.

This guide will not necessarily serve as a full-game walkthrough, so feel free to use Zhain’s video guide if you’d like a walkthrough at any point:
https://steamcommunity.com/sharedfiles/filedetails/?id=3034733598

If needed, you can also use BillyJayGaming’s video guide for a visual reference of all dog tag locations:
https://www.youtube.com/watch?v=Nd0b4gOTWwY

In the starting room:

• Take Diary (document) to proceed
• Read Order to attack and My note on the table in front of you
• Take Rifle (item) on your way out

Completing the Prologue will unlock Morgengrauen.

Starting chapter 1 will unlock Path of Despair.

In the starting room:

• Take Matches (item) by the side of the bed
• Read Postcard (May 3, 1915) on the desk

Exit the room and head to the hallway on the right:

• Read “Medicine” next to the phone on the table

Head back down the hallway to the left of the starting room:

• Take Cog (item) from the workbench near the stairs leading up
• Read Letter: “Elevator” on the same workbench

Enter the first room on the left after going downstairs:

• Read “Cruel” on the trolley straight ahead from the entrance
• Examine “Mater Dolorosa” painting (1/7) on the wall on the right
• Read Postcard (Sep. 15, 1915) on the desk at the back of the room
• Take Orchestrion music roll (item) from the basket to the right of the same desk
• Read Sainte-Balbine postcard on the side table behind the room divider

Exit the room and proceed straight down the hallway towards the dead-end:

• Read Postcard (Apr. 15, 1917) on the trolley on the right
• Take Salt (item) on the same trolley
• Read Letter from Frau Breugel on the trolley in front of the door
• Read Kitchen work rota on the door

Continue down the lower-level hallway:

• Read “The orchestrion” (document) on the drawer along the right wall
• Take Matches (item) from the round table ahead
• Take Red candle (item) from the square table beside the green sofa

Head to the room on the right containing the orchestrion:

• Read Letter about orchestrion (document) hanging from the side of the orchestrion
• Read “Orchestrion repairs” (document) on the chair

Proceed down the hallway again to the main entrance hall:

• Read the two Sympathy cards on the table to the left of the front door
• Read Obituary on the table to the right of the front door
• Take the two Red candles (item) on the table to the right of the front door

Take the stairs to the upper floor of the entrance hall:

• Read “Madness” on the oval table by the windows
• Take Orchestrion key (item) from inside the box on the oval table

Return to the lower floor and go to the hallway at the opposite end of the entrance hall:

• Take Matches (item) and Red candle (item) from the table by the window on the left
• Read Doctor’s note on the drawer on the left past the doorway in the middle of the hallway
• Examine “Him” painting (2/7) on the floor at the end of the hallway
• Take Red candle (item) from the round table past the garden entrance

Backtrack to the room with the orchestrion to get it working, then enter the newly-opened room down the hallway:

• Read “Soon it will be time” (document) on the round table next to the blue gramophone
• Read “The house” (document) on the round table on the left next to the green sofa

Revisit the entrance hall:

• Read Letter from the spiritualist (document) on the ground by the front door, which automatically gives Wax cylinder from the spiritualist (item) and Candlestick holders (item)
• Take Red ball (item) on the ground in front of the stairs

Return to the room with the blue gramophone. Interact with the gramophone and follow its instructions.

Completing the sequence will unlock Not alone.

Follow the tracks to the upper floor bathroom.

• Read “My guilt” on the small table in front of the toilet

Interacting with the red ball in the bathtub will load the next section of this chapter and prevent backtracking.

Follow the main path:

• Read “The church I” on a table next to a lantern along the right side of the path
• Take Pickaxe (item) hanging from a brick wall

After reaching the church courtyard, enter the café on the left:

• Read “Winter 1916” on the counter next to some bird cages
• Read Pastor’s note on a cabinet behind the breakable wall at the back of the café

Pass through the doorway with hanging tin cans:

• Read Can alarm system on the ground next to the corpse where the creature was standing
• The Pastor’s note on the crate to the left of the breakable brick wall is a duplicate of the same note from earlier

The upcoming section presents the first opportunity to unlock Awaken (Get killed by a creature).

Getting past this set of creatures will unlock Hunger.

Proceed through the gap past the creatures and reach the nearby open area with the first siren:

• Read “The church II” on the crate to the left of the siren

Enter the church, before reaching the middle of the church:

• Read “The church III” on a bench straight ahead from where you entered the church

Heading into the middle of the church will load the next section of this chapter and prevent backtracking.

Proceed into the trenches:

• Collect German dog tag #1 (Richard Michalski) next to a corpse on the left after crouching under barbed wire
• Read “Listening post” next to the dog tag

Enter the radio room in the underground area:

• Read Not going back on one of the cots at the back of the radio room
• Read Final entry on the table with the radio equipment
• Read Order to attack on the table with the radio equipment
• The code to use on the equipment is 27

Follow the path out of the trenches:

• Collect German dog tag #2 (Max Schmied) on the ground next to a corpse and a large fire, up the small hill leading out of the trenches
• Read “To Max” on the ground behind the corpse next to the dog tag
• Collect German dog tag #3 (Julius Höbler) below the corpse on a barbed wire barricade, shortly ahead of the last dog tag

Continue to the cutscene at the plane site, before dropping back into the trenches:

• Collect French dog tag #1 (Éric Fabien) on the ground next to a helmet along the outer barricade of the area, to the far left of the plane
• Read Orders: “Flight X-345” (document) on the ground behind the plane
• Collect French dog tag #2 (Jules Honnorat) next to a helmet on the low patch of ground along the barricades on the left
• Collect German dog tag #4 (Ludwig Langenberg) next to the corpse on the small hill leading out of the plane site
• Collect German dog tag #5 (Rudolf Lohmann) on the ground along the left side, near a corpse and some sheets of metal
• Collect German dog tag #6 (Martin Pokora) on the ground along the right side under another corpse on a barbed wire barricade
• Collect French dog tag #3 (Louis Lambert) on the ground next to a helmet, right behind the previous dog tag

Head into the trenches:

• Collect French dog tag #4 (Richard Rossignol) and French dog tag #5 (Maurice Schaeffer) next to the helmet on top of the wall of sandbags along the right side
• Read Postcard from Erich on the stool inside the nearby alcove on the left side
• Collect German dog tag #7 (Erich Faßbender) next to the previous postcard
• Collect French dog tag #6 (René Louvel) behind some boxes on the right side after passing a lantern, shortly ahead of the previous collectibles
• Collect French dog tag #7 (Marcel Passmann) at the end of the wooden shelf along the left side, immediately after the last dog tag

Take the left path at the fork:

• Read “Rosala’s shock on a wooden shelf at the very end of the path, past the ladder
• Collect French dog tag #8 (Remy Michaud) at the end of the same wooden shelf
• Read “The Leutnant frustrated” on the stool immediately after descending the ladder
• Collect German dog tag #8 (Richard Rosala) on a stool at the innermost part of the dorms, past a breakable barricade and next to a corpse wrapped in barbed wire
• Read “Fit for duty” on the lower bed next to the previous dog tag

Return to the right path of the fork and enter the bunker:

• Read “The new Leutnant” on the table with a lantern on the right side of the main area of the bunker
• Read “List of records” beside a gramophone in the nearby room behind a breakable barricade
• Read “Doctor’s complaint” on the corner of another table in the same room
• Read “The curse of my name” on another table with a lantern in the far side of the main area, next to another breakable barricade

After exiting the bunker:

• Read “Latrine duty” on a stool on the left side immediately after ascending from the bunker
• Read “Duty roster” inside the latrine area on the right side, on a box on the left side within
• Read “Flooding” on a box on the left side after breaking the next barrier on the main path
• Read “Hunger in the trench” on a low box along the right side after entering a shallow pool of water, near a path blocked by barbed wire

Passing through the gap begins the next section of the chapter and prevents backtracking.

Follow down the main path ahead:

• Take Morphium (item) from the carriage
• Read “Despair,” a poem (document) on the gate after finishing the action sequence

Continue until you reach the open area with a desk along the right side:

• Read Child’s drawing (document) on the desk
• Read “The music” on the desk

Make a backup of your save folder at this point in order to easily unlock all choice-dependent achievements.

• Run to each of the three stations around the outside of the arena
  • For the “good” choice, activate all gramophones that are lit by a green light and playing “peaceful” music
  • For the “evil” choice, activate all gramophones that are lit by a red light and playing “unsettling” music
• Return to the starting area with the desk to activate the control panel
  • To unlock Hope after making the “good” choice, interact with the creature
  • To unlock An act of compassion after making the “evil” choice, interact with the tree and the growth within, then interact with the creature two times after the cutscene
  • To unlock Despair after making the “evil” choice, interact with the tree and the growth within, then do not interact with the creature for about one minute

For making the “good” choice, you will receive the Fragment of mirror.
For making the “evil” choice, you will receive the Trophy.

Starting chapter 2 will unlock Path of Corruption.

In chapters 2 and 3 you will revisit some of the same areas in the game. Some examinable objects can be found again, but they won’t be mentioned here.

In the starting room:

• Read Postcard (July 22, 1915) in the open drawer on the right side of the desk

Head to the upper floor hallway on the other side of the entrance lobby and enter the large room:

• Read Note on cavalry sword underneath a sword on the red chair on the left side of the balcony area (you may need to inspect the sword first)
• Read Letter: “Combat agents” on the drawer near the same red chair

Descend the spiral staircase to the lower floor of the room:

• Read Article on the General on the display arrangement that the bear is facing
• Read General’s statement on the same display arrangement
• Read Postcard: “Trophies” on the corner of the same display arrangement
• Read “What needs to be done” on the sofa in front of the fireplace
• Read “Paul’s promotion” on the table across from the fireplace and in front of the bookcases
• Read Child’s writing exercise on the same table
• Take Display case key (item) from behind the Omega bookcase across from the fireplace, which automatically gives you “Tank eater” (document)
• Read “Silence and hunger” on an oval table with a lamp near the windows at the far side of the room
• Take Horn (item) after unlocking the display case back at the display arrangement
• Read “A strange dream” (document) in the unlocked display case
• Take Chemical container (item) from the safe behind the gazelle bust to the right of the fireplace (to open the safe, rotate the dial to 1, then 9, then 0, then 8, waiting for a click at each digit)
• Take “Tank eater” formula (document) from the same safe

Go through the door next to the bear, into the garden, and to the room at the far end of the garden:

• Read Letter: “Success” on the desk on the left side immediately after entering the room
• Take Bottle (item) on the round table
• Take Salt (item) on the trolley to the right of the round table
• Read Hydrochloric acid (document) on the table in front of the chalkboard
• Read “The hiding place” (document) on the table in front of the chalkboard
• Take Hydrochloric acid (item) after using the equipment on the left side of the same table
• Take “Tank eater” acid (item) after mixing the Hydrochloric acid and “Tank eater” formula on the equipment on the right side of the same table using 1 “part” of the blue Hydrochloric acid and 3 “parts” of the yellow “Tank eater” formula

Exit garden and pass through hallway leading towards entrance hall:

• Read “It has to end” on the floor near the doorway in the middle of the hallway
• Read “All over” on the floor near the door leading towards the basement

Enter the door leading towards the basement:

• Read “In the basement” in the cabinet in front of the locked basement door

Proceed into the basement and head into the room with the ajar door, before crossing halfway into the room:

• Read “The way out” on the table on the left side immediately after entering the operating room

Crossing the halfway point of this room loads the next section of this chapter and prevents backtracking.

In the starting location and before dropping into the trenches:

• Collect French dog tag #9 (Hyacinthe Wathelet) on the ground next to a helmet along the far right barrier, marked by a white cloth on a wooden post
• Collect German dog tag #9 (David Brauer) on the ground next to a corpse in the middle of the field, directly across from the previous dog tag
• Collect French dog tag #10 (Robert Esnault) on the ground next to an upside-down helmet along the far left barrier shortly ahead, near a large white rock and before passing the burning wagon (maximize your gamma in settings to make it easier to locate)
• Collect German dog tag #10 (Rudolf Eigert) below a corpse on the far right barrier, close to the burning wagon and directly across from the previous dog tag
• Collect French dog tag #11 (François Fournier) on the ground in the middle of the field next to a dying soldier, past the burning wagon and near another set of fires
• Collect German dog tag #11 (Otto Hylka) on the ground along the far right barrier next to a corpse resting on a tall wooden pole
• Collect German dog tag #12 (Hubert Otto) on the ground along the far left barrier after passing between the fires and a tall tree trunk, next to a corpse tangled in barbed wire

Take the left path after dropping into the trenches:

• Read “Gas attack” on the box next to a lantern at the front of the alcove on the right
• Collect French dog tag #12 (Oscar Hervé) on the sandbag next to the previous note
• Read “To Yvonne” on a stool along the wall of the alcove
• Collect French dog tag #13 (Carl Junot) on the table under the French flag at the back of the alcove

Return to the path to the right of where you dropped into the trenches:

• Read La Chanson de Craonne on a small box on the right after crouching under an obstacle
• Read “The tunnel” on a stool along the right side at a point where the path cuts to the left
• Read “Stomping and screaming” on a box on the left side past a cot and dugout
• Take Gas mask, 1917 at the end of the path

After evading the creature you will unlock Rage.

Enter the newly-opened tunnels, before passing over the fiery tracks:

• Collect French dog tag #14 (Hugo Ouvrard) in the first side path on the right, on the ground past the lantern and helmet
• Read “Ouvrard” on the ground at the end of a long rope at the point where the path splits
• Collect French dog tag #15 (Henry Naviaux) on the ground next to a lantern, just past the last note and before reaching the fiery tracks
• Read “They are coming” on the ground along the right side at the start of the fiery tracks

Crossing the fiery tracks and entering the gap at the end of the tunnel will load the next section of the chapter and prevent backtracking.

In the starting area:

• Read “No coincidences” on the box on the right side immediately after crouching under the first obstacle
• Collect German dog tag #13 (Franz Fromm) on the ground next to lantern at a flooded dead end, follow the left wall of the main path through the gassy area
• Read “Anger” on the ground on the left side shortly into the right path of the fork, just past the two creature corpses and near the large fire

Proceed past the next cutscene:

• Read “The explosives storage” (document) on the box to the left of the locked gate leading into the munitions depot in the large open area

Drop into the caves:

• Read “Using gas on the French” on the table immediately after dropping into the caves and before breaking the first barrier
• Answer Field telephone call #1 on the table after climbing the ladder out of the caves

In the grid maze:

• Read Orders: “Gas” (document) inside a box within the small gap along the left wall after the point where you crouch under two obstacles
• Take Creature’s head (item) on the ground in the fiery section of the main path after luring the creature into the munitions depot

Return to the officer in the bunker, on the left side of the bunker:

• Take Dynamo flashlight (item) and Key to the east bunker door from the table by the soldier after his monologue
• Read “The deserter” on the ledge of the window connected to the radio room, at the far left corner from where you entered the bunker

On the right side of the bunker:

• Read “Father’s request” on the table in the small room to the right, past a breakable barrier to the right of where you entered the bunker
• Read “Making a break for it” on a lower bed on the right side of the bunks, across from the previous room
• Collect German dog tag #14 (Hermann Neumann) on the same bed next to the previous note

Exit through the east bunker door:

• Collect German dog tag #15 (Horst Weber) on the ground next to a corpse, between the two obstacles that you need to crouch under
• Read “Home leave” on a low box along the left side shortly after the path curves to the right

After passing through the storage area:

• Read Postcard from Kaspar on a desk in the “writing room” on the right immediately after exiting the storage area

In the “post office” area along the right side:

• Read Letter of condolence inside an openable box on the left side next to the entrance to the post office
• Read Field post regulations on the wall on the right side next to the entrance
• Read Censored postcard on the desk in the dark corner at the back of the post office

At the train station, before traversing the bridge:

• Read “No train” on a stool at the start of the platform on the right side
• Collect German dog tag #16 (Karl Jansen) on the ground next to a corpse within the gassy area to the left of the platform

Reaching the end of the bridge with the train tracks will load the next section of this chapter and prevent backtracking.

Reach the end of the tracks and enter the next area:

• Answer Field telephone call #2 on the catwalks straight ahead
• The “It has to end” note on the machine at the bottom of the stairs is a duplicate of the same note from the start of this chapter

Follow the pipes to the end of the platform and enter the gap:

• Read “Sabotage” (document) hanging on the first furnace that you need to activate
• The “Using gas on the French” note is another duplicate from earlier, found on the ground within the pipes that you crouch through after activating the second furnace

After activating all furnaces and returning to the main factory area:

• Read Child’s drawing (document) on the ground between the door and the ladder leading up to the machine
• Read General’s will on a table in the secret alcove behind the breakable wall in the lower area to the left of the ladder

Reactive the power to lower the bridge:

• Read “Reactivate the factory” (document) on the ground at the end of the bridge
• Read “Corruption,” a poem (document) on the door at the end of the bridge

Make a backup of your save folder at this point in order to easily unlock all choice-dependent achievements. To save more time on your remaining playthroughs, you should ideally make the same choice here that you made in chapter 1 (i.e. make the “good” choice here if you made the “good” choice in chapter 1, otherwise make the “evil” choice again).

• Start the action sequence, then run to each of the four corners of the arena to rotate the valves on the pipes
  • For the “good” choice, rotate each valve to the outside (towards the side where the pipe curves downward, labeled “Lower pressure and divert gas”)
  • For the “evil” choice, rotate each valve to the inside (towards the side where the pipe curves upward, labeled “Increase gas pressure”)
• Activate the switch at the center of the arena
  • To unlock Clarity after making the “good” choice, interact with the creature
  • To unlock An act of courage after making the “evil” choice, interact with the creature two times
  • To unlock Corruption after making the “evil” choice, do not interact with the creature for about one minute
    • Corruption unlocked for me together with An act of courage which may have been an unintended bug, try the method above if the same doesn’t happen for you

For making the “good” choice, you will receive the Fragment of mirror.
For making the “evil” choice, you will receive the Trophy.

Starting chapter 3 will unlock Path of Pain.

If you did not already examine the “Mater Dolorosa” and “Him” paintings in chapter 1, you can find them again in the same locations in this section.

In the starting room:

• Read Postcard (Sep. 12, 1914) in the middle desk drawer
• Read Graduation diploma in the middle desk drawer

Go to the elevator down the hall:

• Take Storage room key (item) on the wheelchair inside the elevator

In the basement area after exiting the elevator:

• Take Matches (item) on the table on the left side next to a lit candle
• The Telephone call on the wheelchair may not count for the related achievement, but answer it anyway just in case

Enter the storage room:

• Read “The cut” on the wall beside the statue in the corner
• Read Page from the Bible on the wall beside the statue in the corner
• Take Key to the blue door (item) after opening the container blocking the path
• Read Note: “Objects of study” on the table inside the room where you restore the power
• Read Shipping company’s note on the same table
• Read “Send them home” inside the crate behind the same table
• Read Label on the side of the same crate

Leave the basement and head through the orchestrion room:

• Read Article: “The factory” on the table on the left side after ascending the spiral staircase

Head into the “blue door” room:

• Examine “Spring Awakening”, 22 painting (3/7) on the floor in the middle of the room
• Examine “The garden” painting (4/7) on the floor in the back corner
• Read “My secret” (document) on the boxes in the middle of the room
• Read “To father” on the desk in the corner
• Read “The Dove and the War” in the middle drawer of the same desk

In the entrance hall:

• Read Obituary: “Blue Dove” on the round table next to a phone

Proceed to the upper floor hallway into the large room with the fireplace and across to the hallway above the garden:

• Read Letter from mil. hospital on the table on the left side, across from the doorway leading to the garden catwalk
• Read “Johannes is alive!” on the same table
• Read “The attic” on the round table next to the phone on the other side of the hallway
• The Telephone call here again may not count towards the related achievement

Inside the garden:

• Examine “Self”, 8 painting (5/7) on a bench in the covered seating area at the back of the garden’s lower level
• Examine “Resurrection”, 4 painting (6/7) on the easel in the same area
• The Telephone call on the pole towards the front of the garden’s lower level may not count towards the related achievement
• Take Attic key (item) from within the mask hanging from the catwalk by moving the ladder to the left, the code is 2248

Take the stairs in the previous hallway to the attic:

• Read Page from an encyclopedia on top of a cage at the corner of the attic in front of the first window that you pass

Climb the ladder in the attic after moving a container and crouching under an obstacle before passing through the door at the end of the attic:

• Examine [Untitled] painting (7/7) to the left of the bed in the loft after climbing the ladder to unlock Art critic
• Read Postcard from Christian on the bed in the loft

Descend from the loft and pass through the next door, which will lock behind you and prevent you from backtracking:

• Read “Black paint” on a bench on the right side immediately after passing through the door
• Read “It is not Johannes” on the stool with a lantern on the left side immediately after passing through the door

Opening the door at the end of this room will load the next section of the chapter.

Break the barrier leading to the hallway outside of the starting area:

• Read Eisenbarth: “Pathetic” on the table underneath the posters, directly ahead after destroying the barrier
• Read Eisenbarth: “Inspection” on the desk in the small room to the right of the previously mentioned table

At the fork ahead, follow the red wires to the right:

• Answer Field telephone call #3 on the desk in the room where the trail of wires connects to a device on a wall
• Read Eisenbarth: “Keys” (document) on the desk next to the phone
• Read Nurse’s note on another desk at the inner corner of the same room

Exit that room and enter the first door on the left:

• Read Head nurse’s report on the bench on the left side
• Take A small key (item) hanging from the lamp directly ahead of another door to the inner part of the room
• Read Note from Junior Dr. Laue on the desk in the same area
• Read the [Patient files] after unlocking the drawer to the right of the desk

Return to the bath area:

• Read Eisenbarth: “Fire” on the bench close to the bright spotlight in the corner
• Take Maintenance room key (item) from inside locker #82 nearby, the code is 0715

Follow the trail of red wires back down to the left path of the fork to activate the power:

• Take Wire cutters from the ground in front of the destroyed wall after the cutscene
• Read A scribbled note on the lit table at the back of the room behind the destroyed wall

Head back to the room with the field telephone and enter the newly opened door:

• Read Eisenbarth: “Security doors” (document) on a bench in the middle of the room, slightly to the left of where you entered
• Read A scribbled note on one of the beds near the yellow lamp to the far left side of the area
• Read Eisenbarth: “Malleable” on a table in front of the locked door on the right side of the area ahead, marked by a red light

It is around this point that I unexpectedly unlocked All knowing (read all letters). Hopefully it will also unlock for you here, but if not I’ll continue to document locations for letters/notes/etc. in case you need them. Once this achievement unlocks, you can choose to ignore all letters/notes/etc.

Proceed into the office at the end of the path by following the red wires:

• Read Eisenbarth: “Pain” on a table along the back wall of the office
• The Eisenbarth: “Security doors” document next to the switch is a duplicate from earlier
• Answer Field telephone call #4 on the desk at the back of the office after activating the power

Backtrack to each of the two previously locked rooms that were marked by red lights:

• Collect German dog tag #17 (Johannes von Schmitt) on the ground straight ahead in the center of the second room, below the hatched egg
• Read “Rebirth” on the red stretcher to the left of the hatched egg in the second room

Activating the switch in the second room will trigger the end of this section of the chapter and prevent you from backtracking. Ending this section will unlock Mayhem.

In the starting area:

• Answer Field telephone call #5 on the table to the right

Cross over the wooden walkway into the sick bay:

• Read Weidenbach’s report on the lit table on the right side
• Read “Neumann’s death” on the bench on the left a bit further inside
• Collect German dog tag #18 (Claus Iwwerk) on the same bench
• Collect German dog tag #19 (Fritz Henning) on the first bed after rotating around to the other side of the sick bay
• Collect German dog tag #20 (Josef Kazik) two beds down from the previous dog tag
• Collect German dog tag #21 (Emil Annoux) on the next cot in the row of beds
• Read “Dying” on the other cot next to the previous one
• Collect German dog tag #22 (Albert Eck) on the covered cot next to the previous one
• Read Poem, Part 1 on the bench to the right of the shrine in the corner
• Collect German dog tag #23 (Kaspar Haffner) on the shrine table in the corner

After cutting through barbed wire and reaching a fork, take the path on the left through a narrow gap:

• Read Stamped bill of delivery on the back of the truck
• Take Empty fuel canister (item) on the back of the truck
• Take Fuel diesel oil canister (item) after filling the canister inside the nearby building

Backtrack through the narrow gap:

• Read “Diesel oil” (document) on a stool next to a lantern, to the side of the generator on the left
• Read “The new pump” (document) on a box in the dark area to the left of the location where you refuel the generator
• Read “The doctor” on a box along the right side after passing the generator and before cutting through more barbed wire

Climb down the ladder into the previously flooded area:

• Read “Fields of the dead” on an upside-down table straight ahead and a bit to the left from the ladder

Take the path on the left:

• Collect French dog tag #16 (Daniel Brunot) on the ground along the right wall of the small room with the bed

Return to the path on the right:

• Collect French dog tag #17 (Emile Anceschi) on the ground under a white light on the left, before cutting through barbed wire
• Read “The flooded shaft” next to the previous dog tag
• Collect French dog tag #18 (Anthoine Émile) on the right side of the dead end straight ahead after cutting through barbed wire

After crouching through the narrow gap at the end of the furniture maze:

• Collect German dog tag #24 (Karl Lycht) on the crate straight ahead after cutting barbed wire
• Collect French dog tag #19 (Camille Javet) on the same crate
• Read “Food theft” on a case above the same crate
• Collect French dog tag #20 (Gaspard Hubert) on the ground along the right wall of the area to the right of the previous crate
• Collect French dog tag #21 (Florian Hugard) on the ground next to a helmet and pillar towards the center of the room, close to the previous dog tag
• Collect French dog tag #22 (Joseph Kaplan) on the ground next to a helmet at the end of the long hallway to the left of the previous crate, before taking the stairs leading out of the area

Traverse the stairways into the bunker:

• Read Poem, Part 2 on one of the beds on the left side of the bunks after cutting through barbed wire
• Read “Starvation at home” on another one of the beds in the same area
• Collect German dog tag #25 (Karl Neye) on the cot straight ahead after breaking the barrier in the bunks, in the room where you left the officer to rest in chapter 1
• Read “Our Dr. Eisenbarth” on a chair at the back of the room containing a furnace and record players, towards the center of the bunker
• Collect German dog tag #26 (Anton Schmedthans) on the chair in the middle of the bunker, next to a table outside the newly-accessible kitchen
• Read “Special treatment” on a table on the left side of the kitchen
• Collect German dog tag #27 (Georg Retzlaff) at the end of the same table
• Read “Scraping the barrel” on another table at the back of the kitchen
• Read Recipe for flour soup hanging on the side of a crate on the right side of the kitchen

Meet the officer outside of the radio room (reload your checkpoint if the dialogue doesn’t trigger correctly):

• Read Orders: “Stand by” on the table that the officer stands by when he gives you your orders
• Take Key (item) on the other side of the table after passing through a gap
• Read Orders: “Searchlight” on the desk in the radio room where the officer was initially standing

You will not be able to backtrack once you’ve recovered the equipment outside of the bunker.

Following the cutscene after recovering the equipment, circle around the perimeter of the area:

• Collect French dog tag #23 (Alexis Schreiber) on a log next to the yellow lantern and cot along the left barrier of the area
• Collect French dog tag #24 (Paul Forget) on the ground next to a helmet and flickering white light in a dead end further ahead along the left barrier of the area
• Collect French dog tag #25 (Jean Forget) on the ground up a short path to a burial site further ahead along the left barrier of the area
• Collect French dog tag #26 (Georges Reverdin) in the same area as the previous dog tag

Continue up the wooden walkway and down the main path, before dropping into the well-lit area behind the second searchlight:

• Collect French dog tag #27 (Charles Neri) on the ground beside a crate with a yellow lantern on the left side, around the point where the music stops and just before the first searchlight appears
• Collect French dog tag #28 (Charles Loyer) on the ground next to a helmet beside a truck at the far left corner of the large area with cannons and searchlights, hug the left wall after the first searchlight to locate the truck

Collecting the 28th French dog tag will unlock Their names.

Dropping into the area behind the second searchlight will end this section of the chapter and prevent you from backtracking.

Follow the path to activate all 6 searchlights and unlock The shining.

Continue down the main path:

• Read “Pain,” a poem on the door blocking the main path

At the end of the main path after the second set of flying birds:

• Answer Field telephone call #6 on the table on the left side to unlock Awaiting orders
• Read Child’s drawing (document) on the same table

Make a backup of your save folder at this point in order to easily unlock all choice-dependent achievements.

• Run to each of the three switches around the outside of the arena
  • For the “good” choice, move all switches down
  • For the “evil” choice, move all switches up
• After activating all switches, stand next to each of the pillars and wait for the creature to collide with all of them to trigger a cutscene
  • Health will unlock after making the “good” choice
  • To unlock An act of mercy after making the “evil” choice, interact with the creature three times
  • To unlock Pain after making the “evil” choice, interact with the creature only one time

For making the “good” choice, you will receive the Fragment of mirror.
For making the “evil” choice, you will receive the Trophy.

Starting chapter 4 will unlock Reflections.

If you’ve made the “good” choice at the end of each chapter, the mirror will be fully assembled and you will also unlock Jigsaw. Walk into the mirror to proceed.

Play out the end sequence until you’ve returned to the bedroom. Before exiting the bedroom:

• Read Polling card on the desk
• Collect German dog tag #28 (Paul von Schmitt) on the ground next to the chair beside the bed
• Read Brother’s diary on the bed
• Read Your discharge papers on the bed

Collecting the 28th German dog tag will unlock No one left behind.

Exit the bedroom to play out the final scene and unlock Peace.

If you’ve made at least one “good” choice and at least one “evil” choice across the endings of each chapter, you will get the “bad” ending.

Play out the end sequence until you end up in the padded room:

• Collect Medal and dog tag (Paul von Schmitt) on the ground by the food tray in the corner, which should count as credit for German dog tag #28

Collecting the 28th German dog tag will unlock No one left behind.

Completing this ending will unlock Lost.

If you’ve made the “evil” choice at the end of each chapter, you will get the “worst” ending.

Play out the end sequence until you’re given the Medal and dog tag (Paul von Schmitt) which should count as credit for German dog tag #28 and unlock No one left behind.

Completing this ending will unlock Ad Infinitum.

By following the guide, you should hopefully have unlocked everything except for some choice-dependent achievements. If you haven’t been making backups to your save folder at the end of each chapter, you’ll need to start a new playthrough from the beginning.

Use these extra playthroughs to unlock any miscellaneous achievements that you may have missed. Check the section below if you need information on individual achievements.

These achievements are listed roughly in chronological order by earliest attainability.

Finish the Prologue.

Story-related, prologue.

Walk the path of Despair.

Story-related, chapter 1.

Have a seance.

Story-related, chapter 1.

Get killed by a creature.

This is a straightforward achievement that is obtainable at various points in the first three chapters. Earliest attainability is at the first encounter with the Hunger creatures in chapter 1.

Survive the first encounter with Hunger.

Story-related, chapter 1.

Grant hope to despair.

Choice-dependent, chapter 1. In the action sequence at the end of chapter 1, activate the three gramophones lit by a green light at the three stations around the arena. Return to the starting area and activate the control panel, then interact with the creature.

An act of compassion.

Choice-dependent, chapter 1. In the action sequence at the end of chapter 1, activate the three gramophones lit by a red light at the three stations around the arena. Return to the starting area and activate the control panel, then interact with the tree and the growth within. After the cutscene, interact with the creature two times.

Kill despair.

Choice-dependent, chapter 1. In the action sequence at the end of chapter 1, activate the three gramophones lit by a red light at the three stations around the arena. Return to the starting area and activate the control panel, then interact with the tree and the growth within. After the cutscene, do not interact with the creature for about one minute.

Walk the path of Corruption.

Story-related, chapter 2.

Survive the first encounter with Rage.

Story-related, chapter 2.

Grant clarity to corruption.

Choice-dependent, chapter 2. In the action sequence at the end of chapter 2, rotate the four valves at the corners of the arena towards the outside (towards the side where the pipe curves downward, labeled “lower pressure and divert gas”). Then activate the switch at the center of the arena and interact with the creature.

An act of courage.

Choice-dependent, chapter 2. In the action sequence at the end of chapter 2, rotate the four valves at the corners of the arena towards the inside (towards the side where the pipe curves upward, labeled “increase gas pressure”). Then activate the switch at the center of the arena and interact with the creature two times.

Kill corruption.

Choice-dependent, chapter 2. In the action sequence at the end of chapter 2, rotate the four valves at the corners of the arena towards the inside (towards the side where the pipe curves upward, labeled “increase gas pressure”). Then activate the switch at the center of the arena and do not interact with the creature for about one minute.

Walk the path of Pain.

Story-related, chapter 3.

Inspect all paintings in the house.

There are seven paintings to inspect in the house. The first two can be found in the first section of chapters 1-3, while the last five can only be found in the first section of chapter 3.

• “Mater Dolorosa”: In the first room on the left after descending the stairs around the elevator
• “Him”: In the lower-level hallway connecting the entrance hall to the garden
• “Spring Awakening”: In the “blue door” room (next to the starting room of each chapter)
• “The Garden”: In the “blue door” room (next to the starting room of each chapter)
• “Self”: In the seating area at the back of the garden
• “Resurrection”: In the seating area at the back of the garden
• [Untitled]: In the loft bedroom within the attic

Survive the first encounter with Mayhem.

Story-related, chapter 3.

Read all letters

The description of this achievement seems to be misleading as you shouldn’t need to read every single examinable object in the game. All of the letters, notes, and documents that I came across in my playthrough are guided above. Even though I likely missed some, the achievement unlocked for me towards the middle of chapter 3. Thoroughly inspect all areas in the game or follow my step-by-step guide and you should hopefully have no trouble unlocking this.

Find all french identification bracelets.

There are 28 French dog tags to collect. You can track your progress in the “Objectives” tab of the in-game menu. The locations of the dog tags are outlined in my step-by-step guide above, as well as in BillyJayGaming’s video guide linked in the “Additional Resources” section of this page.

The breakdown of French dog tag locations is:

• Chapter 1 – Trenches: 8 French dog tags
• Chapter 2 – No Man’s Land: 7 French dog tags
• Chapter 3 – Trenches: 13 French dog tags

Light all six searchlights.

Story-related, chapter 3.

Answer the field-telephone six times.

The field telephone calls are easy to find as they are usually along the main path and identifiable by the loud ringing.

The breakdown of field telephone call locations is:

• Chapter 2 – Trenches: 1 call
• Chapter 2 – Corruption: 1 call
• Chapter 3 – Hospital: 2 calls
• Chapter 3 – Trenches: 1 call
• Chapter 3 – Pain: 1 call

Grant healing to pain.

Choice-dependent, chapter 3. In the action sequence at the end of chapter 3, move the three switches around the outside of the arena to their downward position. Then, stand next to each of the three pillars and wait for the creature to collide with all pillars.

An act of mercy.

Choice-dependent, chapter 3. In the action sequence at the end of chapter 3, move the three switches around the outside of the arena to their upward position. Then, stand next to each of the three pillars and wait for the creature to collide with all pillars. After the cutscene, interact with the creature three times.

Kill pain.

Choice-dependent, chapter 3. In the action sequence at the end of chapter 3, move the three switches around the outside of the arena to their upward position. Then, stand next to each of the three pillars and wait for the creature to collide with all pillars. After the cutscene, interact with the creature one time only.

Look at the Reflections.

Story-related, chapter 4.

Fully assemble the mirror.

In one full playthrough, you must make the “good” choice at the end of each of the first three chapters. In other words, you must take the action that unlocks the achievements “Hope,” “Clarity,” and “Health” which will reward you with three “Fragment of mirror” pieces. This achievement will unlock at the start of chapter 4 if you acquired all mirror pieces.

Find all german identification plates.

There are 28 German dog tags to collect. You can track your progress in the “Objectives” tab of the in-game menu. The locations of the dog tags are outlined in my step-by-step guide above, as well as in BillyJayGaming’s video guide linked in the “Additional Resources” section of this page.

The breakdown of German dog tag locations is:

• Chapter 1 – Trenches: 8 German dog tags
• Chapter 2 – No Man’s Land: 4 German dog tags
• Chapter 2 – Trenches: 4 German dog tags
• Chapter 3 – Hosptial: 1 German dog tag
• Chapter 3 – Trenches: 10 German dog tags
• Chapter 4: 1 German dog tag

Reunite with your family.

This achievement unlocks at the end of chapter 4 with the “good” ending after making the “good” choice at the end of each of the first three chapters. The “good” choices are described by achievements “Hope,” “Clarity,” and “Health.”

End up in the Asylum.

This achievement unlocks at the end of chapter 4 with the “bad” ending after making at least one “good” choice and at least one “evil” choice across the endings of the first three chapters.

You have passed through the fire and been reborn.

This achievement unlocks at the end of chapter 4 with the “worst” ending after making the “evil” choice at the end of each of the first three chapters. The “evil” choices are described by achievements “An act of compassion” or “Despair,” “An act of courage” or “Corruption,” and “An act of mercy” or “Pain.”

Thanks for taking the time to check out this guide. Please let me know if any info seems unclear or inaccurate, or if you have additional strategies to share.