SAEKO: Giantess Dating Sim is a dating simulator that isn’t what it seems. Developed by SAFE HAVN STUDIO, this horror visual novel follows Saeko, a girl with mysterious abilities and the little people she has shrunk down to the size of her thumb.
This guide is a comprehensive breakdown of how to unlock all the endings and Steam achievements in SAEKO: The Giantess Dating Sim.
Come Over To My House
Unlock this achievement automatically when you begin the First Chapter.
Shrinkers Die Twice
Die due to ignoring Saeko during the Night Phase.
Fan Service
Touch a flower in the “Sukebo: The Final” mobile game and get stepped on (quite literally).

Skateboard Master
Complete the “Sukebo: The Final” mobile game.
Well, You Tried
Give the milk to Kina on the Second Day.
True Pacifist
Refuse to feed anyone on the Third Day by giving items other than food to any character during the “Feeding Turn”.
Ecifracs
Unlock this achievement automatically when you begin the Second Chapter.
The Last Lesson
Sacrifice Shimon to Saeko on the Fifth Day, which allows you attend all of his “lessons”.
Final Show
Sacrifice Kina to Saeko on the Fifth Day, which allows you to witness her rock performance.
Crazy Fruit
Learn an unusual use for a cherry by giving Yui the cherry on the Fifth Day.

Change of Heart
Sacrifice Chio on the Sixth Day, then in the following Night Phase conversation with Saeko, tell her you enjoyed your time with her.
Nice Ways To Die
Unlock this achievement automatically when you begin the Third Chapter.
Genocide (First Ending)
Sacrifice Clara on the Sixth Day, then feed Chio or Kazu on the Seventh Day. You will unlock this ending if you side with Saeko every chance throughout the game, e.g. telling Saeko you enjoyed your time as supervisor.
Suicide (Second Ending)
On the Sixth Day, sacrifice Chio then choose the “it was the worst” dialogue option during the Night Phase conversation. On the Seventh Day, sacrifice Kazu then return to the drawer early during the Night Phase to unlock this ending.
Note: We were able to unlock this ending without returning to the drawer early, but we also did not side with Saeko all of the time.
Atonement (Third Ending)
On the Sixth Day, sacrifice Chio then choose the “it was the worst” dialogue option during the Night Phase conversation. On the Seventh Day, sacrifice Kazu then refuse to return to the drawer early during the Night Phase. On the next day, when given the option to kill Saeko, don’t proceed with it to unlock the Atonement ending.
Treat
On the Sixth Day, sacrifice Chio then choose the “it was the worst” dialogue option during the Night Phase conversation. On the Seventh Day, feed Akari instead of Kazu to unlock this achievement.
Unlimited Data
Unlock this achievement by reading all of the Emails.

thx!(≧∀≦メ
Unlock this achievement by reading all of the Cell Phone Novel chapters.

Endless
Start a new game after unlocking any ending.
World Is Mine
Complete all the entries in the Dictionary. This can be done across multiple playthroughs, and you can click on the “switch” button to view everything you’ve unlocked across saves. Here is how to earn every single Dictionary entry:
- Charm: Finish the prologue
- Cookie: Ask what food Saeko likes during the First Night Phase
- Camera: Explore Saeko’s past memories during the Second Night Phase
- Knit Cap: During the Third Night, refuse the first two earrings and flirt with Saeko by telling her she doesn’t need earrings because she’s cute without them.
- Jewelry Box: Complete Chapter 1
- Figurine: Talk about monster movies during the Fourth or Fifth Night Phase. In order to trigger this dialogue tree, answer “yes” when she asks “if I was in a fantasy world, do you think I’d be the villian?”
- Sunglasses: Sacrifice Kina on the Fourth or Fifth Day, then say you want to be reborn into a handsome guy during the following Night Phase conversation. Try to flirt with Saeko to unlock this collectible.
- Concealer: Show interest in makeup during the Fourth or Fifth Night Phase.
- Seashell / Broken Seashell: Complete Chapter 2
- Hand Mirror / Shattered Hand Mirror / Turned Hand Mirror: Complete the Seventh Night.
Note: For the Seashell and Hand Mirror collectibles, you can collect each variant by completing all three endings. Collecting all the variants is necessary to unlock the World Is Mine achievement, although the game will only display one variant at any given time.

Read our full review of SAEKO: Giantess Dating Sim here, and wishlist the game on Steam.