There is a simple rule for this, just like any games you might ever play before, you have to look into every corner of the game and never go straight to the exits.

A thing is, there are both hard to find and easy to find dossiers hidden all the places. Sometimes storyline will even send you away from the dossiers. You also can't go back to get the dossiers left behind if you already left that area so be careful.

I will also include some hints for getting some dossiers in spoiler texts. Watch it if you want.

This guide is still incomplete and needs to be expanded. I already found 16 dossiers in 5 chapters.

UPD1: Added "what's it about" sections of each dossiers in spoilers. Still no luck of finding other dossiers yet.

UPD2: Based on the devs comment here I was able to find the last dossier to finish my archivist achievement! The last one is quite hard to find...

Let's begin!

1: room 2h; Anton's file cabinet

Key is in Anton's locker.

What's it about? Cassius D data



2: room 2h; Red room, on the table.

Code for the door is in Anton's computer.

What's it about? The Director's health condition

1: room 2a; At the computer screens

What's it about? Cassius F trial on live birds



2: room 2d; Under the table near the door

What's it about? Sabotaging genes to spread another one.



3: room 2b; In the top left drawer

What's it about? A cure that killed local bees

1: room 5c: On the crate, when you go down the lift, walk to your right, it will be on the rightmost pillar.

What's it about? Abandoned trial



2: room 5g; On the table

Code in room 5c computer. Will also get you another achievement.

What's it about? Dr.Stone abduction plan



3. room 5i; Cabinet straight from the door

What's it about? Tanner's condition after pyro experiment failure.



4. room 5d; In the left hood, inner room

What's it about? Director's condition is curable, along with a cheque.

1. F-3 lobby; Right desk top-right drawer

What's it about? Residential block expansion



2. room 3e; Next to the TV screen

Code to this room is in a computer in room 3g.

What's it about? Memory retention of Dr.Larson



3. room 3a; Next to the computer

What's it about? Silvermatter project



4. room 3b; In the washroom

What's it about? Dr.Larsen's final assessment report



5. room 3c; On the speaker next to the washroom

What's it about? Canon that makes people laughs

1. room 1j; On the table next to the computer

What's it about? Nanotech accident report



2. room 1e; On the table next to the computer, inner room

Code to this room is in a computer in room 1j.

What's it about? Subjects to be put in cyronics test



3. room 1f; On the table

What's it about? Reversing ADAM to basics.

That's it for now. It's not a complete list but I'll keep you updated. If you find other dossiers in any other places than what currently in my guide please tell me and I will add them for you. So, in the future ,we could get a complete list to complete this achievement!

Thanks for reading!