Compare The Butterfly Sign: Human Error prices across trusted key stores and find the best deal. Developed by Quantum Phoenix Bucharest. Published by Quantum Phoenix Bucharest. Released on 3/16/2017. Available on PC. Genres: Action, Adventure, Indie.

A first-person detective chapter that sells itself as a sequel but delivers mostly recycled ground, broken achievements, and a developer who vanished before finishing the story.

I want to be the person who defends small, handcrafted detective games from Bucharest that nobody reviews. With Human Error, I genuinely tried. The underlying concept still has a quiet pull to it: protagonist Jack is bedridden after a terrorist attack on Memority hospital, and the only way to piece together what happened is to dose himself with an experimental memory drug called Rammex and walk back through his own recollections. The dual-world structure, flipping between a still hospital room and the reconstructed past, has an atmospheric logic that the first chapter used with some grace. Puzzle work happens inside those memories, clue-hunting across a hospital setting, password-cracking terminals, and investigation sequences where wrong choices eat up your limited attempts on higher difficulties. On the punishing Suicider setting the tension is real. On Amateur, investigations are gate-free and meant purely for story access, though achievements are disabled there entirely. Here is the honest problem: players who completed the first chapter will recognize the vast majority of Human Error immediately. The environments are the same, the puzzles largely repeat, and the new story material amounts to a handful of scenes scattered across what reviewers clocked at roughly thirty to forty minutes of fresh content. The remaining runtime is a replay of events already witnessed. That is not a second chapter by any fair measure; it is closer to a director's cut that was sold as a continuation. The non-linear dialogue system and the promise that choices ripple forward into a third chapter added an expectation the studio never fulfilled. Chapter three, announced for mid-2017, was never released. The developer went quiet on their forums and social channels shortly after launch. There are genuine craft traces here if you look. The Unreal Engine visuals in the outdoor mountain approach carry a clean, melancholy light. Shadows of former hospital staff, frozen mid-action in darkened corridors, land with quiet dread the first time you notice them. The atmosphere the first game built has not entirely evaporated. But the GUI calibration issues that broke point-and-click interaction for some players at launch, the broken achievements including repeats carried over from chapter one, and the total absence of post-launch support mean that even fans of the original have little reason to trust this release. Community feedback has settled at a mixed rating hovering around fifty percent positive, which tells the whole story more politely than most of the individual reviews do. If you never played chapter one, there is a sliver of a case for picking up both entries together at a steep discount, purely to experience the atmosphere and the memory-drug conceit while it still feels fresh. But go in knowing the larger arc is a dead end. Chapter three is not coming. The story closes without resolution. Human Error earns its subtitle in ways the developers likely did not intend. Kai, Scout Team

The Butterfly Sign: Human Error

The Butterfly Sign: Human Error

Mar 16, 2017Quantum Phoenix Bucharest
GamerScout Says

A first-person detective chapter that sells itself as a sequel but delivers mostly recycled ground, broken achievements, and a developer who vanished before finishing the story.

PC
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Lowest tracked: €0.99
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GamerScout Verdict

Skip unless you can grab both chapters dirt-cheap and accept the story will never reach its promised ending.

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€1.55
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€1.70-66%
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€4.99
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Price History

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About The Butterfly Sign: Human Error

I want to be the person who defends small, handcrafted detective games from Bucharest that nobody reviews. With Human Error, I genuinely tried. The underlying concept still has a quiet pull to it: protagonist Jack is bedridden after a terrorist attack on Memority hospital, and the only way to piece together what happened is to dose himself with an experimental memory drug called Rammex and walk back through his own recollections. The dual-world structure, flipping between a still hospital room and the reconstructed past, has an atmospheric logic that the first chapter used with some grace. Puzzle work happens inside those memories, clue-hunting across a hospital setting, password-cracking terminals, and investigation sequences where wrong choices eat up your limited attempts on higher difficulties. On the punishing Suicider setting the tension is real. On Amateur, investigations are gate-free and meant purely for story access, though achievements are disabled there entirely. Here is the honest problem: players who completed the first chapter will recognize the vast majority of Human Error immediately. The environments are the same, the puzzles largely repeat, and the new story material amounts to a handful of scenes scattered across what reviewers clocked at roughly thirty to forty minutes of fresh content. The remaining runtime is a replay of events already witnessed. That is not a second chapter by any fair measure; it is closer to a director's cut that was sold as a continuation. The non-linear dialogue system and the promise that choices ripple forward into a third chapter added an expectation the studio never fulfilled. Chapter three, announced for mid-2017, was never released. The developer went quiet on their forums and social channels shortly after launch. There are genuine craft traces here if you look. The Unreal Engine visuals in the outdoor mountain approach carry a clean, melancholy light. Shadows of former hospital staff, frozen mid-action in darkened corridors, land with quiet dread the first time you notice them. The atmosphere the first game built has not entirely evaporated. But the GUI calibration issues that broke point-and-click interaction for some players at launch, the broken achievements including repeats carried over from chapter one, and the total absence of post-launch support mean that even fans of the original have little reason to trust this release. Community feedback has settled at a mixed rating hovering around fifty percent positive, which tells the whole story more politely than most of the individual reviews do. If you never played chapter one, there is a sliver of a case for picking up both entries together at a steep discount, purely to experience the atmosphere and the memory-drug conceit while it still feels fresh. But go in knowing the larger arc is a dead end. Chapter three is not coming. The story closes without resolution. Human Error earns its subtitle in ways the developers likely did not intend.

Kai
Kai · Scout Team

Indie & narrative

Tags

singleplayerachievementstrading-cardstier:sub-5First-Person DetectiveMemory MechanicBranching DialogueHorror-AdjacentAbandoned SeriesInvestigation PuzzlesDifficulty TiersAtmospheric Walking

System Requirements

Minimum

OS
Windows 7, 8 or 10 (64bit)
Memory
4 GB RAM
DirectX
Version 11
Storage
20 GB available space
Graphics
GTX 660 or R9 270x
Processor
Intel Core i3-6100 or AMD FX-6300

Recommended

Requires a 64-bit processor and operating system

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Game Info

Developer
Quantum Phoenix Bucharest
Publisher
Quantum Phoenix Bucharest
Release Date
Mar 16, 2017

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Frequently asked questions about The Butterfly Sign: Human Error

How much does The Butterfly Sign: Human Error cost?

As of 8 September 2026, the cheapest in-stock offer for The Butterfly Sign: Human Error is €0.99 at Eneba, out of 5 live offers we track across verified key stores. Prices change daily — the table on this page is refreshed continuously.

Where can I buy The Butterfly Sign: Human Error cheapest?

The lowest in-stock price we track for The Butterfly Sign: Human Error is €0.99 at Eneba (8 September 2026). We compare 5 live offers from verified key stores — the full table with every store and its trust score is on this page.

What platforms is The Butterfly Sign: Human Error available on?

The Butterfly Sign: Human Error is available on PC.

When was The Butterfly Sign: Human Error released?

The Butterfly Sign: Human Error was released on 16 March 2017.

Who developed The Butterfly Sign: Human Error?

The Butterfly Sign: Human Error was developed by Quantum Phoenix Bucharest.