Quantum Suicide

Science-fiction visual novel about a spaceship AI's deadly survival games

Cotton Candy Cyanide · Released Sep 10, 2020

Reviews: Mostly Positive; 74% of 95
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Playable
Last update on Steam: 4 years ago; Oct 29, 2021
Minimum PC: DirectX 9 GPU; 2 GB RAM; Full requirements

What is Quantum Suicide?

You play a researcher aboard a spaceship searching for humanity's next home in this science-fiction visual novel. A corrupted AI forces the crew into weekly games of survival. You read dialogue and make decisions along story branches determined by which characters die.

For you if...

+you enjoy mixing romance with life-or-death decisions
+you like replaying visual novels to uncover different outcomes

Not for you if...

−you prefer stories without violence or psychological horror
−you want the true ending without playing both protagonists

What players say

74% of 95 reviews are positive

Players praise the premise, characters, and artwork. They criticize choices that seem inconsequential and a lack of polish, with recent reviews still noting overlapping character images, voice lines containing retakes, and writing inconsistencies.

Screenshots and trailer

Quantum Suicide system requirements

Minimum: DirectX 9 GPU, 2 GB RAM.

As published by the developer.

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Minimum

OS: Windows XP or higher.
Processor: 2.0 GHz Core 2 Duo
Graphics: OpenGL 2.0 or DirectX 9.0c
Memory: 2.0 GB GB RAM

Does Quantum Suicide have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Quantum Suicide run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

Some in-game text is small and may be hard to read
All functionality is accessible with the default controller configuration
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows, macOS, Linux
Achievements: 21
Steam features: Family Sharing
Languages: Full audio: English, Japanese.

Does Quantum Suicide use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam