Ord.

This can be obtained from the "Foul Things." mode under "Stories."
If you still need the "Usurper", "Fraternal", or "Liberty" achievements, follow the guide for those and you'll [maybe] get this achievement en route to those (It's subject to RNG whether the needed prompt shows up). If you already have those and missed this achievement, follow this guide. That being said, this guide will not continue for the full play-through beyond obtaining "Operator."

There are sections of this mode that are linear and always happen in a certain order, while other sections have multiple different prompts that occur randomly. For that reason, it's impossible for me to know if I'm covering all of the possibilities, but I will address those that I encountered.
In certain situations, there are multiple actions that will work, but for the most part I'll just be saying the specific actions I used. Example: in the second room when you have to hide, it doesn't seem to matter whether you hide behind the crate or the racks, but I'll be giving the specific choices I used to complete this.
Also, this is unfortunately pretty long, so if you encounter a scenario that I did not and have to restart, I apologize. Please feel free to contribute in the comments with any useful information, and I will add to the solution and give credit.

The following template will be used:
"Prompt." > "What I selected."


Awaken. > Rise.

You then start in a room. Don't interact with/use anything other than the bucket or brick in the wall. (Don't Drink from the bowl, don't Squeeze through the window, etc.)
There are two ways to get out of the room, either:

Bucket. > Carry.
Bars. > Bucket.
Rusty. > Pry.
Opening. > Lower.

Or:

Wall. > Examine.
Inspect. > Brick.
Brick. > Remove.
Rat. > Brick.
Dead. > Leave.
Hole. > Search.
Key. > Door!

Either way, you'll then be in a cellar. You encounter the door, crate, and racks in a random order. Ignore the crate, inspect the racks and take the bottle (there's a torch under the crate, but you can't carry both and you need the bottle).

Example of cellar "run-through":

Cellar. > Look.
Door. > Listen.
Crates. > Push.
Torch. > Leave.
Racks. > Take.

Regardless of the order you encountered those, it returns to a linear portion now:

Noise! > Where?
Unlocking! > Hide!
Where? > Racks!
Racks. > Behind!
Door. > Watch...
Escape? > Run!
Almost! > Bottle!
Light! > Squint...
Kitchen. > Smell?
Chef... > Huge!

There's now a handful of different things you can encounter at random. After dying a couple of times here, I found it best to not interact or use anything when possible.
Examples:

Tile. > Examine.
Weapon? > Leave. (Pry. make you cut yourself and bleed out.)

Mousetrap! > Sigh.

Meat. > Inspect.
Hungry... > Poke.

Those are the ones I encountered, there might be more. Eventually you'll get a prompt for either Freezer. or Sinks. Some play-throughs I only had to do one, sometimes I had to do both with some of the randomized events between, and sometimes I had to do the Freezer twice, so it's pretty random. You'll know you're done with this cycle when you get the Chef. prompt to Sneak. or Avoid.

If Freezer. then:
Freezer. > Behind.
Noises? > Check.
Hide! > Behind!

If sinks then:
Sinks. > Water?
Noises? > Check.
Hide! > Water!
Submerged. > Stay.
Washing... > Stay.
Wiping... > Stay.
Stillness... > Stay.
Panic! > Surface!
Safe... > Smell.


When done with that loop:

Chef. > Sneak.
Under? > Knives.
Precarious... > Slowly...
SHIIING! > Run!
Exit! > Run!
Spillage! > Around!
Unnoticed. > Breathe.
Corridor. > Look.
Exits. > East.
Door. > Open.
Nursery. > Moonlight?
Nurse! > Freeze!
Carrying... > Blankets?
Baby... > Strange...
Crib. > Baby?

We're now back to a randomized part. Because I played this less than the kitchen section, I probably didn't encounter all of the possibilities.
It turns out the nurse is blind, so if you are prompted to run or freeze, it worked for me to freeze. You're done with the randomized part when you're prompted to go Under. or Inside. the Cribs.

Toys. > Look.
Inspect. > Teddy.
Comforting... > Take.

Desk. > Drawer.
Handle. > Leave.

Box. > Look.
Stopped! > Leave.

Nurse. > Examine.

In one of my play-throughs, I got cornered near the crib, the baby started crying, and I got caught. I didn't have the teddy bear in that play-through, and I have a feeling if I did it might have stopped the baby from crying, but that's just a guess. I haven't ended up in that scenario since then.
Eventually, you'll get to:

Cribs. > Under.
Gap. > Inspect.
Enter? > Crawl.
Forward. > Webs.
Spider! > Watch.
Webs. > Through.
Exit... > Breathe.
Lucky... > Peek.
Door. > Open! (Note that this is Open! and not Open..., I never tried the latter so I'm not sure if it works or not.)
Lounge. > Inspect.
Hidden... > Watch.
Leaving... > Key?
Gone. > Listen.

Now another randomized portion. The following is what I encountered. Again, there might be more possibilities. You're back to the linear section when you get the Stairs. prompt.

Baths. > Leave.

Armchair. > Search.
Cosy... > Leave.

Door. > Listen.

Gramophone. > Leave.

Bookcases. > Search.
Books. > Hardback.
Hardback. > Return.



Stairs. > Inspect.
Examine. > Upstairs.
Ascend. > Slowly.
Hallway. > Look.

Now we arrive at a randomized portion that either will or will not allow you to get the Operator achievement. In order to get it, you need to get the "Dresser." prompt:

Dresser. > Search.
Search. > Shelf.
Telephone! > Dial.
Number? > Operator. (This is the step that gives the achievement in question.)