Buy Parallel Experiment CD Key for PC

  • PC
Parallel Experiment cover
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The cheapest price is 6.79€ (-13%) at Difmark with a rating of 4.0 (8.2k reviews) · Version Steam Account · Region Global · We compare prices at 2 verified stores with 2 active offers · Updated on 05/12/2025 09h 11min. ago

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The KEY format at Difmark is the cheapest for the version from 7.80€

Buying at Difmark saves you 13% compared to the official store

Most users have had positive experiences buying at Difmark4.0(8.3k) which has an offer with a price of 6.79€

At Gocdkeys our recommendation is to always buy the KEY format, preferably from Instantgaming due to its reliability. If you prefer the account format, which is cheaper, we recommend buying from Difmark.

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About Parallel Experiment

IMPORTANT: "Parallel Experiment" is a 2-player cooperative puzzle game with escape room-like elements. Each player must have their own copy on either mobile, tablet, PC or Mac (cross-platform play is supported).

In the game players take on the roles of two detectives who are often separated, each with different clues, and must work together to solve puzzles.  Internet connection and voice communication are essential. Need a Player Two? Join our community on Discord! Find the link on the side of our Steam page.

Parallel Experiment is a noir-inspired adventure with a comic book art style, featuring detectives Ally and Old Dog. While following the trail of the dangerous Cryptic Killer, they suddenly become his targets and are now unwilling participants in his twisted experiment. 

This is the second standalone chapter in the “Cryptic Killer” cooperative point-and-click puzzle game series. You can play Unboxing the Cryptic Killer first, if you want to learn more about our detectives and their nemesis, but Parallel Experiment can be enjoyed without prior knowledge.

KEY FEATURES

? Two Player Co-Op

In Parallel Experiment, players must rely on their communication skills as they’re separated and must each discover unique clues that are vital for solving puzzles on the other end. Teamwork is essential to crack the Cryptic Killer’s codes.

? Challenging Collaborative Puzzles

There are over 80 puzzles striking the perfect balance between challenging yet fair. But you're not facing them on your own! Communicate with your partner on how to best proceed, solve a puzzle on your end that unlocks the next step for them and discover a wide variety of puzzles from redirecting water flows, finding computer passwords and unlocking intricate locks, to deciphering cryptic ciphers, soldering electronic components, and even waking up a drunk!

?️ Two Can Play That Game

Looking for a break from the main investigation? Dive into a variety of retro-inspired mini-games designed with a fresh cooperative twist. Challenge each other to darts, Three in a Row, Match Three, Claw Machine, Push and Pull, and more. Think you know these classics? We’ve reinvented them for a whole new co-op experience

?️ Cooperative Dialogues

Uncover vital clues through collaborative conversations. NPCs respond dynamically to each player, offering new layers of interaction that only teamwork can unravel. Some conversations are puzzles in themselves that you need to solve together!

?️ A story told in panels

Our love for comic books shines in Parallel Experiment. Every cutscene is presented as a beautifully crafted comic book page, immersing you in a gripping, noir-inspired narrative.

How many pages did we create to tell the story? Almost 100 pages! Even we were surprised by how much it took, but every panel was worth it to deliver a story that keeps you on edge until the very last frame.

✍️ Draw on… Everything!

Every detective needs a notebook. In Parallel Experiment, players can jot down notes, sketch solutions, and interact with the environment in creative ways. But we all know what you're going to draw first…

? Annoy Each Other

​This is a key feature? Yes. Yes, it is. ​

​Each level will have some way for players to annoy their co-op partner: knock on a window to distract them, poke them, make their screens shake. You already know you'll be doing this just by reading it, right?

Parallel Experiment has a variety of mind-twisting challenges that push the boundaries of cooperative puzzle design, offering situations never seen before in other games.

Everything you need to know to buy Parallel Experiment for PC at the best price


Assuming we all know what digital versions of games are, which usually come in digital code, key or Steam Key format, let's highlight the 3 most interesting formats for buying Parallel Experiment for PC in digital format, although there may be others:

-Parallel Experiment Steam Account: This is an account that contains the game Parallel Experiment already installed. It's cheaper than the rest, but it may violate certain platform policies, and its activation process is not as straightforward as digital keys.

-Parallel Experiment Steam Key: It's a cd key that will allow us to activate Parallel Experiment on our Steam account. It's the most recommended digital version, for its price and ease of activation. If you want to know how to activate this format easily, you can visit our blog with the entire activation process for keys on Steam.

-Parallel Experiment Steam Gift: It's a URL that will activate Parallel Experiment on your account and leave everything ready for you to start downloading the game. It's a cheap format with very fast activation, but it has more problems than the other formats.

Our recommendation: Buy Parallel Experiment for PC in Key or digital code format!

Can I activate the STEAM Key of Parallel Experiment in my region?


Digital formats of games, and in this case for Parallel Experiment, often have different activation regions. Currently, at Gocdkeys, we differentiate 4 regions:

Global: Which means you can activate that game anywhere in the world.
EU: You can only activate that digital key in regions or countries within the European Union.
US: It's only possible to activate that code in North America.
UK: It's only possible to activate that key in the United Kingdom.

Our recommendation: Buy Parallel Experiment in your corresponding region or in Global if you prefer not to take risks!

Are all stores selling Parallel Experiment for PC reliable?


We have 13 years of experience in the digital gaming market and have always resolved any issues our users have had with any store. So, you should trust us, as we will respond to any problems that arise with any of the stores we list. Just contact us and we will help you.

Most common FAQs when buying Parallel Experiment for PC in digital format:

  • What is the key for Parallel Experiment on PC?

    It is a key that will allow you to download the game Parallel Experiment on your PC from official download platforms.


  • What's the best price for buying the key of Parallel Experiment for PC?

    As of 05/12/2025, in United States, the best price we have found in our selection of online stores that include the key for Parallel Experiment on PC is €6.79.


  • Why is the Steam Key of Parallel Experiment safer than the account format? See more

    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 Parallel Experiment to your game library. The account format requires more complicated steps and is more prone to errors during activation.


  • What issues can arise when activating a Steam Key of Parallel Experiment? See more

    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 Parallel Experiment, and they will provide a new key. You can also contact us, and we’ll help you out.


  • How long will I have to wait to receive the Steam Key of Parallel Experiment after purchasing it from a store? See more

    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.


  • What guarantee do I have that the listed stores are reliable? See more

    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.

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