# Parallel Experiment — Co-op escape room > Two-player cooperative puzzle game with escape room elements and comic book art. (iPhone/iPad app by Eleven Products Sp. z o.o..) - Source: https://appshunter.io/ios/app/parallel-experiment/id6477541914 (this page in markdown: same URL + `.md`) - Developer: [Eleven Products Sp. z o.o.](https://appshunter.io/developer/1040907730) - Category: Games, Adventure, Puzzle - Price: $6.99 - Rating: 3.30/5 from 7 App Store ratings · 12 written reviews indexed - Age rating: 12+ - Requires: iOS 12.0 · 1.2 GB - Languages: American English - Released: 2025-06-05 - Data updated: 2026-09-08 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/parallel-experiment/id6477541914/reviews.md ## What is 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! ABOUT THE GAME 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. ## Key features - Two Player Co-Op - Challenging Collaborative Puzzles - Retro-Inspired Mini-Games - Cooperative Dialogues - Comic Book Storytelling - In-Game Notebook for Notes ## Chart rankings - #77 in Top Paid · Adventure (US App Store) - #56 in Top Paid · Puzzle (US App Store) ## Recent user reviews (10 of 12) All indexed reviews: https://appshunter.io/ios/app/parallel-experiment/id6477541914/reviews.md ### 5/5 — Best CO-OP Game *2026-03-26* Started with Unsolved Case, and loved the whole series, Definitely worth the money. The graphics, storyline and the puzzles, everything was on point. Keeps you engaged throughout. ### 5/5 — Brilliant Sequel *2026-03-26* We really enjoyed this game, the prequel was good but they really added finer details to this one and was longer as well, very satisfied even after paying for the game. Some levels really make you think! Highly recommend, and hoping for another sequel/release by the developers. ### 5/5 — Incredible incredible incredible *2026-03-18* You can tell there was so much work that’s gone into this and it’s super fun to solve and I just love the animations- thank you so much. Me and my partner’s favourite thing to do is your games. Hope you keep putting new ones out there ### 5/5 — Awesome game! *2026-03-08* This is a great co-op game! Some of the puzzles can be a little tricky at times but nothing impossible. My wife and I played through the whole game and only had to look up a walkthrough a few times. Would recommend to anyone looking for something to play together! ### 1/5 — Scam *2026-02-05* My husband and I both purchased this game to play together and we spent 3 hours playing and both hit save and quit and when we go to play again nothing is saved and it forces us to start all over. This has happened twice. Don't pay for this game it's a scam. **Developer response:** Hi! The save file is saved every few seconds, so it's really weird that you don't have it... Please note that only the host stores the save files, so if you're restarting the game, make sure that the same person creates it. Additionally, we have just released an update that backs up the save files to the cloud, to make it extra sure that the files aren't lost. If the problem persists for you, please reach out to us at support@elevenpuzzles.com, and we'll do our best to fix your issue. Thanks! ### 5/5 — Muito bom *2026-01-20* Espero mais jogos como esses que façam eu e meus amigos pensarem em como resolver, minha nota 10/10 ### 5/5 — Fun puzzles! *2026-01-16* Had a blast playing it with my wife! I recommend it to any puzzle lovers that enjoy coop games ### 1/5 — On the last puzzle *2025-11-13* There no way of for second person to get out of the maze when it comes to pulling the levers and making the squares go up and down, saw the hint video and the guys had completely different levers than mine ### 5/5 — Love this *2025-07-27* The best mobile Co-op game ever. I am waiting for the next game impatiently! ### 1/5 — Extremely buggy *2025-07-06* This game is extremely buggy and crashes all the time, making it unplayable. ## Frequently asked questions about Parallel Experiment ### What is Parallel Experiment? Parallel Experiment is a 2-player cooperative puzzle game with escape room elements. Players take on the roles of detectives who must communicate and share clues to solve puzzles together. ### How many players can play Parallel Experiment? Parallel Experiment is designed for two players. Each player needs their own copy of the game on a compatible device, and cross-platform play is supported. ### What are the system requirements for Parallel Experiment? Parallel Experiment is available on iPhone, iPad, and iPod. It also supports PC and Mac, allowing for cross-platform play between these devices. ### Does Parallel Experiment require an internet connection? Yes, an internet connection is essential for Parallel Experiment. Voice communication between players is also crucial for solving the puzzles. ### What is the price of Parallel Experiment? Parallel Experiment is a paid game, priced at $6.99. There are no in-app purchases or advertisements mentioned. ### How often is Parallel Experiment updated? The latest version of Parallel Experiment is 2.0.2, which was last updated on March 12, 2026. This indicates a relatively recent update history. ### What is the age rating for Parallel Experiment? Parallel Experiment has an age rating of 12+. This suggests it contains content suitable for players aged 12 and above. ### Can I play Parallel Experiment offline? No, Parallel Experiment requires an internet connection to play, as it is a cooperative game that relies on communication between players. ## Version history (last 5 releases) ### 2.0.3 — 2026-04-02 This update from Apple will improve the functionality of this app. No new features are included. Bug fixes and improvements: - Fixed an issue allowing horizontal movement on a raised platform while holding the prism - Fixed levitation after stepping off a platform in the platform maze - Fixed an issue where a screw could be tightened while opening the workshop cover - Fixed an issue allowing progression with only one mouse placed on the cheese - Fixed graphical issues after restarting the MagneTron 3000 mini-game - Fixed disappearing rotation arrows when quickly clicking the hint button - Fixed reversed image order in hints - Fixed a locked slot near the brain after connecting the tip to two slots ### 2.0.2 — 2026-03-12 Bug fixes and improvements: - Fixed an issue with the "Silly" achievement - Fixed a bug preventing return to the Temple of Trials for players who completed the game in a previous version but did not finish the Temple in a single session - Updated hints to accurately match the environment - Adjusted the difficulty of the knife section - Added an option to watch all cutscenes (including those that were cut in the 2.0 update) from the main menu. - Fixed a bug preventing the elevator from resetting correctly in investigation mode - Fixed a bug causing symbols in the first section of the game to become invisible - Fixed various other minor bugs ### 2.0.1 — 2026-03-06 Bug Fixes: - Fixed an issue where the game completion achievement failed to unlock. - Fixed a bug preventing players from loading a save after finishing the game to use remaining tokens. ### 2.0.0 — 2026-03-04 Detectives! This update introduces significant content changes and improvements: - New Level: We added "Temple of Trials" a completely new chapter near the end of the game with fresh cooperative puzzles - Reworked Finale: We redesigned the ending to improve pacing and engagement (story is left intact) - New Hint System: You can now access over 300 hints to get a nudge without spoiling the solution - Streamlined Story: We tightened conversations and cutscenes so you can focus more on the puzzles - Cloud Saves: Your progress is now automatically backed up online - Bug Fixes: We squashed numerous bugs and improved overall stability Important: Both players must have version 2.0.0 installed to play together. If you have an old save file, you can load it to access the new content immediately. ### 1.0.11 — 2026-02-05 Bug Fixes: - Fixed an issue that prevented the virtual keyboard from opening automatically on Steam Deck - Fixed occasional crashes when approaching lights in the workshop - Fixed several minor issues with the workshop assembly machine - Fixed an issue that prevented players from opening the token machine after completing a mini-game - Fixed an issue where lock numbers were positioned incorrectly in the museum - Fixed an issue causing pool balls to move incorrectly in certain situations - Fixed an issue where the gargoyle would not recognize the glass in some cases - Various performance improvements ## Apps similar to Parallel Experiment | App | Rating | Price | Category | | --- | --- | --- | --- | | [Boxville 2](https://appshunter.io/ios/app/boxville-2/id6670721926) | 4.8 (292) | $1.99 | Games | | [Tick Tock: A Tale for Two](https://appshunter.io/ios/app/tick-tock-a-tale-for-two/id1357651989) | 4.2 (290) | $2.99 | Games | | [Ada's Study](https://appshunter.io/ios/app/adas-study/id1550115133) | 3.6 (35) | $0.99 | Games | | [The Darkside Detective](https://appshunter.io/ios/app/the-darkside-detective/id6473466126) | 4.9 (47) | $3.99 | Games | | [Follow the meaning](https://appshunter.io/ios/app/follow-the-meaning/id6740814979) | 4.3 (85) | $2.99 | Games | | [The Past Within](https://appshunter.io/ios/app/the-past-within/id1642601792) | 4.9 (7,180) | $2.99 | Games | ## More apps by Eleven Products Sp. z o.o. - [Unsolved Case](https://appshunter.io/ios/app/unsolved-case/id1639547822) - [Unboxing the Cryptic Killer](https://appshunter.io/ios/app/unboxing-the-cryptic-killer/id6448352407) - [Parallel Experiment Lite](https://appshunter.io/ios/app/parallel-experiment-lite/id6477541907) All apps by Eleven Products Sp. z o.o.: https://appshunter.io/developer/1040907730 ## Related topics [parallel experiment](https://appshunter.io/ios/topics/parallel-experiment) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*