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Project Subtrahend is a choose-your-own-adventure visual novel, where you’ll have the chance to get to know the stories, pasts, 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.
Linux · Dec 1, 2023
Worldwide · Exact date · Full release · IGDB
Mac · Dec 1, 2023
Worldwide · Exact date · Full release · IGDB
PC (Microsoft Windows) · Dec 1, 2023
Worldwide · Exact date · Full release · IGDB
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45 achievements available.
Persuade Dane to have a good ending with River.
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Let Amelia die.
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Let Angel die.
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Escape through the balcony.
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Amelia, Peter, and Jaaaay all survive.
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Watch Peter's confession to Jaaaay.
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Meet Ivy on the bus.
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Save Jaaaay, allowing him to survive.
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Let Dane die.
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Dane and River survive and Dane mistreats River.
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Achieve the worst Valorie ending.
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Fight your way out with a weapon.
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Fight your way out without a weapon.
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Dane survives but does not send you any letter.
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Get the good luck charm from Peter.
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Angel goes back into the facility to save River.
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RIver and Dane survive and Dane is abusive towards River.
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Return the necklace and save Mareeya and Valorie.
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Survive using the religious ending.
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Find out how Angel survives in the Scraps.
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Let Ivy die.
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Discover Jaaaay's true identity.
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Let Jaaaay die.
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Valorie confiscated the pills.
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Dane takes River away from Angel.
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Peter is left all alone without Jaaaay and Amelia.
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Let Mareeya die.
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Pick the red and white polka-dot headband.
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Score 5/5 on the test.
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Read notes with Amelia.
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Let Peter die.
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Find out about Jaaaay's past.
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Let River die.
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River and Dane survive and have a happy ending.
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Save every single person, including yourself.
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Talk to Ivy alone for third time in the bedroom after agreeing to convert.
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Watch Peter die.
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Escape through the vent.
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Go on the lunch date with Dane.
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Convert to Sicknessism.
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Dane sends you a love letter.
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Let Valorie die.
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Return Valorie's necklace.
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River survives but loses Angel and Dane.
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River and Dane survive and River is forced into a girl by Dane.
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