Quantum Suicide

Quantum Suicide

Cotton Candy Cyanide · 2020 · Visual Novel, Story Rich, Mystery, Choices Matter, Multiple Endings

PC
Mostly Positive74% · 93
Best price
$19.99
lowest tracked $9.99
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Standard Edition · Steam
$19.99
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About Quantum Suicide

Quantum Suicide is a game of betrayal, deception and romance in the cold depths of space.

This science fiction thriller visual novel tells the tale of an intergenerational mission and its diverse crew, fighting against a deadly AI (and each other) for the chance to survive. Strategy, love interests and quantum mechanics await you. Your choices change the fate of everyone in Quantum Suicide.

You play as a researcher aboard a spaceship on an epic mission to find humanity a new home. The mission is jeopardized by a corrupted A.I system that forces you to play "The Deletion Game", a weekly game where you must battle your crew mates for survival. Prepare to make both friends and enemies of your crew members as you play through rounds of "The Deletion Game". Can you see the Everett's mission through to the end...alive?

Quantum Suicide features:
- Over 30 different endings
- The choice to play as a boy or a girl
- 7 romance endings (Including 3 Male, 3 Female and the A.I. system)
- The romance options have their own sexual preferences - (romance and friend zone endings depending on your choices)
- Original Soundtrack
- Available in English and Japanese, with full voice acting
- Death around every corner

Can you see the Everett's mission through to the end...alive?

*Please Note: Quantum Suicide does not follow traditional dating simulator/game structure of a point or flag system - narrative branches are based on character deaths. It is also a requirement to play as both the male and female protagonist in order to achieve the true ending. Questionable design choices, I know, but whats done is done and you have been warned :)*

Current Build Version: 29.10.211.
To ensure your game is up to date, please select Extras from the Main Menu > Credits > The version is listed in the bottom left hand corner :)

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Nov 24, 2024
D.A.I. jokes are hilarious. It makes me wanna die. ;>>>>>>>>>>> I love play on words and D.A.I. puns ~Meow
2 found this helpful
Recommended Sep 28, 2024
Good game, although I hated being forced into romances/friendships depending on the story branch.
1 found this helpful
Recommended Sep 3, 2024
Definitely worth it if you're fan of Danganronpa or Zero Escape. This game picks and chooses some of DR and ZE's best elements, like a high-octane VN plot, FTE-type character building, multiple pathways and endings, and, of course, a murderous mastermind in control of the ship. The writers and developers are true fans of the genre and it shows. Also, I want to highlight that this VN's art is so professionally done. Fantastic replayability value as well.
1 found this helpful
Recommended Feb 7, 2026
This was an interesting Visual Novel with a great premise and intriguing characters.
Recommended Nov 11, 2025
I think this game is quite solid. If you enjoy games in this genre then this is right for you -- that said, it's not nearly as polished as some other Uchikoshi-inspired works. After wrapping up every ending, it was worth the play, even if there wasn't ever a huge reveal in the end. I did really hope that the minigames were going to be harder to figure out, but the nature of the game basically just means you try most permutations until you get the ending you want. The secret endings are hidden behind some rather obtuse gates (I was putting in any line of text that seemed viable until a thread told me it was an extension of what I assumed it was). It was a bit of a miss in otherwise a strong game. I really loved the idea and execution of D/AI so much that I was surprised it hasn't been done in a mainline game; they were cooking with it and honestly worth the price tag just to experience that.
Not recommended Nov 5, 2025
Insert complaining that Steam doesn't allow mixed reviews. Quantum Suicide is a fine game. It has its moments and its characters that I liked, particularly 90% of the stuff to do with Dai, however there is a very clear lack of polish put behind everything. Minor inconsistencies can be seen through out such as issues with sprites layering, issues with voice lines keeping in retakes, and issues with writing that really could have used a second look over. None of these on their own break the experience, but it gives the impression that there wasn't much care put into the game... So why should you or I care about it either?

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