
Two detectives, one deadly experiment, a race against time. Each player only has one half of the puzzle. In this 2-player co-op puzzle game you can survive the parallel experiment only by working together.
Modeled estimate, not a reported figure. How we estimate →
Prices
The United States storefront in every case, so this compares stores and not countries.
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 0.71/day in the week to Sep 7 → 0.71/day in the week after.
Reviews, worldwide (the counter carries no country): 0.86/day in the week to Jul 25 → 2/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 26 chart moves that followed a price cut of more than 20% went a median of 7 places towards #1, and the 2,400 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
About
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.
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.
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!
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
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!
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.
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…
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.
Sums Steam + Google Play
| Store | Price | Audience | Score | Chart | Est. revenue |
|---|---|---|---|---|---|
SteamYou are here | $5.99−40% | 838reviews | 85% | — | $130.2K |
| $6.99 | 62ratings | 74% | — | $123K |
Matched by title — a reused name can pair the wrong games. * is a critic aggregate. Prices and positions are each store's United States storefront; Epic charts worldwide. Audience and Score too, except Steam's, which is worldwide.
Engagement
Reviews
Themes across 115 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
I love this series! I wish there were more like it! Absolutely love the inclusion of a hint system. The puzzles are mostly fun, and when there is one that doesn't logic for me I having the hints is a godsend! However.... Timed puzzles, and a certain audio design choice I don't quite understand... Timed puzzles just don't work for some of us. A timer can make it hard to concentrate for people with certain neurodivergences. I would really like accessibility options to turn off the timer. Also having the someone repeatedly talk while you're supposed to be communicating information with a friend causes my brain to freeze up. I can't communicate over someone else. There were at least two puzzles where this was an issue, and a third where it was a little annoying. I would suggest having them say a couple of lines and then stop talking for the duration. As mentioned there's a lovely hint system, if we need a hint we will get it there. The ambient music is plenty of noise. I don't' need someone to yell at me repetitively while I'm trying to talk.
Yes.
Media

Related
Related
Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
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Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English*, French, Italian, German, Polish, Russian, Simplified Chinese, Spanish - Latin America, Turkish*languages with full audio support
Hours played at review time, across 115 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
Great Co-Op puzzle game!
Great short co-op experience
游戏很好玩,解密难度适中,剧情也比较有意思,与好友玩的很尽兴。期待后续续作。
Parallel Experiment toma las bases de Unsolved Case y Unboxing the Cryptic Killer, pero ofrece una experiencia mucho más ambiciosa, con puzzles más elaborados, una historia más desarrollada y una cooperación que se siente más natural que nunca. Si los juegos anteriores parecían escape rooms cooperativos, Parallel Experiment se siente como una auténtica investigación detectivesca compartida. La historia continúa los acontecimientos de los juegos anteriores y, como es habitual en la saga, cada jugador recibe información distinta, haciendo que ninguno tenga todas las piezas del rompecabezas. Si disfrutaste los otros juegos de la saga Cryptic Killer, este juego es prácticamente obligatorio. Duración: 3-5 horas.
interesting
Z moją Partnerką przeszliśmy już niejedną kooperacyjną escape roomowa grę, a jednak żadnej nie przyznałem jeszcze znaku jakości. Zrobię więc turbofalstart i powiem, że ten czas nadszedł. Może trochę na wyrost, ale doceniam Polskie niszowe studio i swojskość wynikającą z osadzenia akcji w Krakowie i szefa policji Bogdana z wąsem. Parallel Experiment to w tym kontekście zwieńczenie miniserii takich właśnie kooperacyjnych puzzlerów. (Poprzednie części to Unsolved Case i Unboxing the Cryptic Killer). Jestem z reszta pod ogromnym wrażeniem jak owa seria się rozwijała. Zaczynała od poprawności, przez dobrą jakość a kończąc na poziomie, gdzie jest na prawdę tuzem gatunku. Podstawową ideą rozgrywki jest więc fakt, że wraz z drugą osobą znajdujecie się w osobnych pomieszczeniach i musicie skomunikować się z sobą tak by przekazać sobie informacje potrzebne do rozwiązania zagadek w obu pomieszczeniach. Parallel Experiment robi jednak wszystko by podkręcić to do granic możliwości. Zagadki są pomysłowe, co rusz do samej formuły dochodzi minigierka, albo twist. W tej części dodano nawet bonusowe zagadki i znajdźki. To niesamowite bogactwo jak na grę, którą przechodzi się w jakieś 5 godzin. W temacie oprawy audiowizualnej widać pewne ograniczenia budżetowe, ale to co najważniejsze jest spełnione. To znaczy gra ma swój styl i jest czytelna. Sam fakt, że nie pamiętam, by gdzieś ilustracja była niejasna jest ogromnym świadectwem tego drugiego. Przyznam, że raz czy dwa zdarzyła się zagadka, która mogłaby być lepiej zakomunikowana, ale to bardziej footnote do mojego doświadczenia niż coś co by miało na nie znaczny wpływ. Co mi pozostaje powiedzieć, to że liczę, że twórcy - Eleven Puzzles, zrobią więcej niż tylko 11 zagadek. Jeśli macie jakąś osobę, z którą lubicie chodzić do escape roomów lub grać w kooperacyjne gry koniecznie dajcie szansę. Zarówno w formie całej serii jak i jako standalone grę, bo wydaje mi się, że kontekst fabularny z poprzednich części nie jest aż tak ważny.
Puzzles just challenging enough that you and your friend have to think them through together...
WE DID IT YESSSSSS. Now I expected another game after this one with the alt ending and all but it is what it is. also p.s. the mother was absolutely a baddie in the past. OH AND FOR THE LOVE OF ALL THINGS HOLY PEOPLE NEED TO LEARN CLOCKWISE AND COUNTER_CLOCKWISE
Active players
Estimated daily and monthly active players (DAU/MAU) modeled from peak concurrency.
Players by region
Where this game's players are, estimated from review languages.
Players also reviewed
The games this title's players most often review too — audience affinity.
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