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A Project Arrhythmia Steam Key — also known as a CD Key or digital code — is the official activation code you redeem on Steam and keep in your library permanently. From €2.18 (€2.28 with fees, -85%) at Difmark Digital Keys, 85% below the €15.49 (no fees) Steam price · 9 verified stores, 10 offers in stock · Updated 11min ago.

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Difmark Digital Keys 4.1 (14.2k)
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Key4Games 4.3 (37)
No code available
€2.59
Store Key4Games
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Region Global
Steam Key
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Fees +€0.35
G2A 4.0 (352.8k)
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K4G 4.4 (19.5k)
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Official stores
Steam 1.8 (3.7k)
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€15.49
Store Steam
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About Project Arrhythmia

"Project Arrhythmia" is a musical bullet-hell in which all things beautiful are deadly. A cacophony of lights, music, pulses and blocks, Project Arrhythmia features tight bullet-hell style gameplay where up to 4 players in local co-op must navigate their way through evolving scenes and obstacles, all timed to the beat.

STORY

Set in 207X, a mysterious disease called "LNNS" has been ravaging the world. A lone AI researcher, Anna Schroeder, attempts to find the cure with her trusty supercomputer companion HAL. Stumbling upon various “Projects,” the duo decides to investigate the efficacy of a cure using a pulse/rhythm-based interface. Work in progress.

CURRENT FEATURES

  • Dodge The Beat: Stages consist of mesmerizing, musically timed scenes, each one telling a story. Feel the rhythm and feel your way around the hazards! Anna will judge how you do.

  • Challenge Your Friends: Up to 4 players supported in local co-op mode.

  • Robust Level Editor: A carefully designed level editor allows users to create their own levels and challenges using whatever music they wish.

  • Huge Community: A Wealth of user-created content exists, fully integrated into the game through the usage of the level editor and user-made levels. Already, 2000+ community levels have been uploaded, and more are being made daily.

  • Story Mode Demo: Currently, the game features a short 5+ story levels as a demo for the upcoming complete story mode. 

UPCOMING FEATURES

  • Complete Story Mode: Over 20+ hand-crafted heart-pounding levels interwoven with an engaging story.

  • Constant Updates: More features come with bi-weekly updates to keep the game fresh.

Some screenshots used are from UGC:

  • Sleep Cannon by cozm

  • Excelsus by DXL44

  • Lucid by Taikeb0

How much does Project Arrhythmia for PC cost right now?

Project Arrhythmia for PC starts at €2.18 (€2.28 with fees) at Difmark Digital Keys, a Steam key, which is 85% under the €15.49 (no fees) it costs on the official store.

That €2.18 (€2.28 with fees) already includes the Gocdkeys coupon, so apply it at checkout or the store will show you a higher price.

Supply is thin — 10 offers from 9 stores — and thin supply keeps prices steady rather than falling.

Is it worth buying the Steam Key for Project Arrhythmia now or waiting?

That €2.18 (€2.28 with fees) key is expensive for what it usually costs.

  • Those €2.18 (€2.28 with fees) are 31% above what it usually costs, measured on the store price.
  • 9 stores sell the Steam Key at the same time, and with that much competition the price moves almost daily.
  • Across the 486 days we have tracked it, it has only been pricier than today on 7 days. The lowest it has ever cost is €1.07.
If you do not need it today, waiting pays off: we have seen it at €1.07 and right now you would pay €1.52 more. We will tell you the day it drops.

Worked out from 1,906 daily records of the Steam Key for Project Arrhythmia across 10 stores. See the full price history.

The price does not include each store's payment fees. The percentage is measured on the store price, without coupons, because that is how we record the history. The analysis only counts Key offers. Shared accounts, Steam Gift and physical editions stay out, because they are not the same product and their prices move differently.

Can you activate Project Arrhythmia in US?

All 10 offers are Global, so the code redeems on any account no matter where it was created.

Why is there such an expensive Project Arrhythmia offer?

One listing is worth ignoring: the Steam key that Steam has at €15.49 (no fees) is more than 6 times the cheapest offer and is not what this game costs. The number to work from is €2.18 (€2.28 with fees) at Difmark Digital Keys.

Information about Project Arrhythmia for PC


"Project Arrhythmia" is an exciting musical game where beauty and danger intertwine. Immerse yourself in a vibrant world of flashing lights, captivating music and rhythm-synchronized challenges.

Set in a distant future affected by the mysterious "Tokyo Flu," you follow Anna Schroeder, a determined programmer alongside her supercomputer companion HAL, in search of a cure through a pulse and rhythm-based interface.

Take on fascinating scenarios that tell stories through musically timed challenges. Every move and decision you make is crucial as you avoid obstacles and adapt to the changing pace. Anna will assess your skill as you progress, maintaining intensity and excitement throughout.

Challenge your friends in local co-op mode, where up to 4 players can team up to take on challenges together. Additionally, the robust level editor allows you to create your own custom experiences, using the music of your choice.

The active community contributes a variety of user-created content, which is seamlessly integrated into the game through the level editor and a voting system to select the best levels.

Most common FAQs when buying Project Arrhythmia for PC in digital format:

It is a key that will allow you to download the game Project Arrhythmia on your PC from official download platforms.
As of 08/11/2026, in United States, the best price we have found in our selection of online stores that include the key for Project Arrhythmia on PC is €2.18 (€2.28 with fees).
The Steam Key format is what we always recommend due to its ease of use and higher security compared to any other format. You just need to redeem the key in your account to download Project Arrhythmia to your game library. The account format requires more complicated steps and is more prone to errors during activation.
The only issue we’ve encountered in 13 years is receiving a duplicate key that doesn’t work. In that case, simply contact the store where you bought Project Arrhythmia, and they will provide a new key. You can also contact us, and we’ll help you out.
Delivery times vary by store. For example, in the case of Instatgaming, Eneba, G2a, or Kinguin, delivery is usually instant or takes just a few minutes. These stores rarely delay game deliveries.

Other stores may take 30–40 minutes depending on game availability. On release days, delivery times may be slightly longer.

If you notice an unusually long delay, contact the store or us, and we’ll resolve it as quickly as possible.
At Gocdkeys, we only list the most well-known stores that have passed our quality checks. One of the most important factors is good customer support, and all listed stores offer it.

There have been occasions when those services were overwhelmed, which is why we also offer 24/7 customer support to help resolve any issues or questions.

In any case, we always offer a 100% guarantee, so you won’t have any problems, and if you do, we’ll resolve them as soon as possible.

Need more help? Use our FAQs.

What do our users think of Project Arrhythmia for PC Digital?

5/5 (1 Comments)
Soli Ny

An absurd, music driven bullet hell, with neon colors and pulse-based rhythms to a chaotic experience, with co-op mayhem always possible. With procedurally timed obstacles and a fully fledged level editor with workshop support, it's a creative fever dream.

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Project Arrhythmia

Is it worth it?

Excellent overall reception
  • 95%Steam reviewsOverwhelmingly Positive · 2,537 reviews
  • 5.0/5GoCDKeys users1 ratings →
Write a review → See it on Steam →

About the game

Release date
15 Jun 2019
Genre
Action Indie Arcade
Modes
Multiplayer Singleplayer Co-op
Setting
Level Editor 2D Difficult
Languages
English

Requirements

Minimum:
  • Requires a 64-bit processor and operating system
  • OS *: Windows 7+
  • 2 GHz+ (this varies with core count)
  • 4 GB RAM
  • Version 10
  • 1 GB available space
  • Additional Notes: For the level editor computer's of this kind can sometimes suffer
Recommended:
  • Requires a 64-bit processor and operating system
  • OS *: Windows 8+
  • 3 GHz+ (this varies with core count)
  • 8 GB RAM
  • Version 10
  • 2 GB available space
Minimum:
  • OSX 10
  • 2 GHz or Higher
  • 2 GB RAM
  • 200 MB available space
Recommended:
  • OSX 10
  • 3 GHz or Higher
  • 2 GB RAM
  • 500 MB available space
Minimum:
  • Ubuntu or equivalent
  • 2 GHz or Higher
  • 2 GB RAM
  • 200 MB available space

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