This Yet Another Killing Game Complete Achievement Guidecovers all major achievements across the three parts of the game. You cannot earn everything in a single run, so we’ll use a few well‑placed saves to minimize repeats. Secret achievement(s) are excluded.

Big spoiler warning: Read while playing. I call out save points and choices right before they matter.

Yet Another Killing Game Complete Achievement Guide

Part 1

Prologue & First Choices

The First Choice
Make any opening choice to pop your first achievement.

Name Achievements

• Pick a name (any name works; the guide’s example uses “Yuri”).
• You’ll see a joke about “Karma” in the process; continue to set any valid name.

SAVE HERE before choosing your first exploration area (Upstairs / Kitchen / Bathroom). We’ll do a Bathroom route first for a block of achievements, then reload.

Bathroom Route (from the save)

Gacha Garbage
Enter the bathroom and keep rummaging the trash until you get the paper with directions.

Germs Are Silent Killers
Turn on the tap, then use soap to wash hands.

Hogging the Bathroom
Reach 100% investigation in the bathroom (you should be 44%+ after the early steps).

All Dogs are Good Dogs → A Wild Dog Chase
Leave the bathroom, pet the dog, then chase it.

Reload your save (before picking Bathroom) to preserve an Act 3 achievement later.

Kitchen & Dining

Go to Kitchen first.

Only Chosen Intellectuals
Inspect the pepper shaker twice.

Comparing Notes
Investigate Kitchen beyond 40%, then speak with Cecilia and humor her ideas.

Pet Pal
After Kitchen, go to Dining Room with Cecilia. Inspect the pet bowl once, answer anything but “nothing,” inspect again and choose “no, x are fine.”

Dining with Death
Reach 100% investigation across Kitchen/Dining.

Choose the dialogue that suggests killing Oriana for a non‑progression achievement later, then head Upstairs.

Upstairs & Early Endings

It Was All a Dream
In the Master Bedroom, examine the bed, jump on it, then jump again for an early gag ending.

I <3 Red Panda’s I swear
In the room with the red panda plush, call it a tanuki or raccoon, then inspect again.

The Infamous Hypothetical
Check the remaining left‑side rooms, then ask Oriana for her thoughts.

Residential Remnants
100% the Second‑Floor investigations, including hallway points.

Now pick the moral stance with Oriana to aim for the Chaos path first:

• Tell Cecilia: you’ll kill Oriana yourself during the night.
• Let the ending CG roll for:
  • The Accomplice Ending (you volunteer to kill)
  • You Cannot Escape Chaos (watch the CG)
  • Reject the loop’s result and continue for The Fun Never Ends (loop acknowledgment)

Now repeat Act 1 loops (skip re‑investigations when possible) to collect the other Act 1 endings:

• The Demon Condemned (Order Ending)
  Tell Cecilia you are not killing Oriana, and tell Oriana something other than “It’s always wrong to kill people.”
• The Blood on Your Hands (Karma Ending)
  Convince both Cecilia and Oriana that the other should die. Skip to night and watch it play out.

Seeking the Truth (still Part 1)

Go through the truth‑seeking dialog chain:

• Ask why they keep secrets, how they know each other, who else is in the club.
• Ask all available questions until only “about your 3rd member” and “Why do I keep going back in time” remain.
• Ask about the 3rd member → “Is that person me?” → Argue with “She used the wrong name.”
  • An Elusive Truth unlocks.
• My Little Buddy
  Name the dog anything you like when prompted.

That completes Part 1’s achievement set.

Part 2

We’ll visit areas in an efficient order: Lounge → Attic → Basement → Hatch sub‑endings → Library.

Lounge

• We Don’t Reuse Gags Here
  Sit on the couch, then sit again (ignore Ria).
• A Convenient Inconvenience
  Examine the TV twice.
• Ria’s Resolution
  Reach >70% investigation, then ask Ria for her thoughts.
• Familial Fragments
  100% the Lounge (remember to check the fireplace twice).
• Watch the end scene for the Judgement ending:
  • Hell is Where Demons Roam

Attic

• Don’t Read Too Deeply Into This
  Inspect the upside‑down cross twice.
• Hyperfixations are Fun
  Inspect the left‑hand pile of books twice.
• The Hero’s Duty
  Reach >60%, then ask Cecilia for her thoughts.
• Occult Obsession
  100% the Attic investigation.
• Watch the Despair ending scene:
  • Lost in the Depths of Despair
  • Remember the phrase from this scene; we’ll use it later.

Basement

You’ll be pushed here after events.

• Fate is a Cruel Mistress
  Inspect the cloth in the bottom‑right twice (jump scare).
• Memories and Identities
  Reach ≥40%, ask Ria for her thoughts.
• Human Re‑Instrumentality
  Reach ≥70%, ask Cecilia for her thoughts.
• Under a Corpse’s Gaze
  100% the Basement.

Hatch Sub‑Endings

You can now trigger three outcomes by choosing who goes down:

1. Ria jumps → backstab route → Darkness ending
   • Watch Your Back
2. You jump → learn your “true name” while burning
   • C:/Users/YourNameHere (name used doesn’t matter)
   • Also grants the Light ending: Ashen Memories
3. Cecilia jumps → progression requirement; you’ll be railroaded to the next location after.

Library

• The Beginning of the End
  Open the chest under the desk, read the book fully.
• Keep Quiet in the Library
  100% the Library (no real time limit despite the tension).
• Serena Killed the Clownfish
  In the ensuing conversation, recite the phrase learned in Despair:
  “Serena … Killed … the Clownfish.”
• Kindness Has Many Forms
  When prompted, pick “You really are a weirdo.”

That wraps Part 2.

Part 3

First Aid, Theory, and Trust

• Carrying the Team
  Go upstairs and wash Ria’s wounds.
• Can You Handle the Truth?
  When asked who the mastermind is, suggest it’s one of us, then accuse Cecilia.
  Do not roll back. The achievement pops for committing to your take.
• You are Your Own Worst Critic
  Continue talking with Ria. When choosing between “You’re stronger than you think” and “You’re being too harsh on yourself,” pick the latter.

Dog Scene & Bathroom Payoff

• One Last Petting… Oh.
  Investigate the dog scene to 100% for an achievement.
• Not Your First Playthrough, Eh
  To trigger this cleverly, avoid the Bathroom until you’ve visited Kitchen, Lounge, and optionally Basement first.
  Then enter the Bathroom to unlock it.
• Detectives are Murder Magnets
  100% the Bathroom investigation.

The Final Forks

SAVE HERE at the “Proceed” prompt before the last choice set.

Knife Choice Endings

• The Path of No Regrets (Martyr)
  Pick the bottom‑center knife. Let credits finish, then reload the save labeled Part 3 Chapter 7.
• Oriana
  Choose to kill Cecilia and insist. Achievement pops for the Oriana ending.
• Cecilia
  Choose to kill Oriana. Achievement pops for the Cecilia ending.
• Mixed route:
  Select Oriana, choose to kill, then Don’t kill. Repeat with Cecilia.
  Let the timer run out and continue to questioning.

The True Ending vs Rejection

SAVE HERE when you’re first given the Sacrifice choice.

• The True Ending (Salvation)
  Choose Sacrifice Yourself. Watch to the end for the achievement.
• Rejecting the True Ending
  Reload, refuse to sacrifice, and keep refusing. Achievement pops for rejection.

Bad Deduction + Correct Deduction

• ggwp
  Pick a wrong deduction immediately after refusing to sacrifice. You’ll see a bad ending and earn the achievement. Then “Try again.”
• Correct Deduction Path (answers in order):
  1. The Professor’s death…
  2. He didn’t actually die.
  3. It’s a soulless shell.
  4. By inhabiting…
  5. There are multiple…
  6. Someone picked…
  7. Cecilia.
  8. You were forced…
     After the Q&A, you can skip forward.

Knife Duel & Closers

• Ultimate Duelist
  In the duel, choose:
  • Bide your time.
  • Block low.
  • Try to attack…
  • Dodge.
  • Block horizontally.
  • Block high.
  • Down arrow.
  • Clockwise arrow.
• Morbid Curiosity
  In the brief dog interlude, wait and observe to die; then follow the plan on retry and attack when called.
• Dismiss the Professor’s speculation about your name. It’s not required to complete the list.

FINAL SAVE HERE at the “Escape or Stay” choice.

• You Found It.
  Choose Escape with your friends for the penultimate completion achievement.

At this point you should be at 59/60, with the remaining one tied to content outside the scope of this guide (secret achievement). Your earlier saves position you to go hunting without redoing long sections.

Fast Reference: Critical Saves

1. Act 1, first area choice → before Bathroom (preserves a Part 3 payoff)
2. Part 3, “Proceed” before knife board”
3. Part 3, Sacrifice choice
4. Part 3, Escape/Stay