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Project Subtrahend

Also known as Project Subtrahend, project subtrahend, project-subtrahend

Project Subtrahend is a choose-your-own-adventure visual novel, where you have the chance to get to know the stories, lore, and personalities of nine unique characters. Choices matter in this game, and it's up to you who lives or dies as you explore what it means to be human.

Last update
19 May 2026
Players now
0
Original sources
1
Latest update
Announcement

Update notes for March 17 2024

We noticed the Scrapbook wasn't quite acting right, so now you will actually have the correct amount of photos in each character's Scrapbook, proportional to the amount of achievements you've unlocked. As always, some s…

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Update history

Browse past updates and patch notes for this game.

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New updates will show up here as they ship.

Gallery

In-game media

Achievements

Community progression

Top picks from 45 Steam achievements, sorted by player unlock rates.

  • CuriousMeet Ivy on the bus.88.5%
  • Balcony escapeEscape through the balcony.71.4%
  • Ivy diedLet Ivy die.71.4%
  • Valorie diedLet Valorie die.71.4%
  • D is for daddySave Jaaaay, allowing him to survive.68.5%
  • Peter diedLet Peter die.68.5%