Right now you need to do this because else the achievement won't unlock. (Alright it says it work now but I would recommend still doing this setup just in case you know)
However in the future when the update will come (around Half-Life 3 release date from what i heard) the achievement will not have the NOT YET RELEASED and will be unlockable without this.
Steam library\Budgets Cuts\Propreties












Go on the Beta section and select [openbeta]












Then well launch the game

At first i shared a walktrough of the game but it just didn't feel right to share it
So i removed that section however if you are really stuck you can find a lot of speedrun witouth any kill on the internet

TIPS BEFORE PLAYING:
-Remember don't kill roomba and drone they are robots too and also supervisor CAN'T shot each other
-If you are in a bad situation steal their guns
-Don't get caught (they are actually a lot more stupid than you tought you can litteraly just go in their back and get pass them)
-Teleport fast
-You can actually teleport really far away

GOOD LUCK

Alright so here nothing is really hard but here you go

First you start by getting the teleport thingy


Then go on the other building


Then when you get there go behind the supervisor with the vent

When you get there go get the Lvl1 keycard but don't forget to crouch to not get caught

After teleport on the right take the elevator


Open the door a little and teleport to the right


And get to the next level

Nothing hard during the start so no picture


When you get there teleport really fast to get to the vent at the end of the corridor


Go there


After just go behind the supervisor with the help of the vent


We don't see him but get behind the supervisor by the window


Get there to get the Lvl2 keycard


Now by the vent go to the top-down floor level you should not get caught


Go there don't make too much noise and get the keycard

Really fast level don't kill the drone


Go get the keycard inside the desk

And finish the level

This is where the challenge strat to get difficult go there behind the supervisor (and teleport fast !)


Vent


When you are here be careful the supervisor is really annoying but get the Lvl5 keycard


After return to the red part but with the Lvl5 keycard to get the Lvl7 keycard


Then emergency to get to the vault blabla you played the game


Get virus and to get out TELEPORT REALLY FAST


After call winda to get the password to get the elevator code and avance to the next level

Now go get the screwdriver


Then hydrate yourself (b*tch)


Then open all the vent you need it can be useful to escape


Then boom go on the vent and go on the stockage room at the end of the room(teleport fast !)

After teleport fast again and when you are to the red pillar you don't need to stole the Lvl8 keycard you just need to got up the vent


After get back to the control room turn on the electricity and unscrew the srews (yeah i'm good in english) to get the code and finish the level like you would normally do

Well i won't do the Level 6 cause there isn't anything pacifist to do there but i hope you enjoyed the guide :D
You can like or fav or give me steam points or other ♥♥♥♥... hope i helped you !