Home / Games / Parallel Experiment
Parallel Experiment
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.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-25.
“This is a great game! IF YOUR FRIEND WOULD ACTUALLY PLAY IT WITH YOU AND NOT SAY HE WILL AND THEN PLAY SIEGE ALL DAY! THAT'S RIGHT I'M TALKING TO YOU, MAX!”
— a player, Steam review · 22 hrs played“Great game but after going to the basement in the 2nd chapter the woah and wow voice lines are switched for the subtitles. Please fix”
— a player, Steam review · 3 hrs played“The puzzles are rather intuitive, provided you're able to communicate with your partner. Be descriptive and tell them what you see. You both need each other to get through. I would only recommend getting the game if you and your partner can make it through the demo. If you can…”
— a player, Steam review · 10 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-08 via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-09-26. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-25). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Patch 2.1.0 - Japanese and Korean localization
New Features: Added Japanese localization Added Korean localization
Parallel Experiment is now Steam Deck Verified!
Parallel Experiment is now Steam Deck Verified! Unsolved Case and Unboxing the Cryptic Killer also run smoothly on Steam Deck, though incorrect button prompts may occasionally appear. A fix is coming
Parallel Experiment - Patch 2.0.3
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
Sales in Russia suspended due to connection issues
Detectives, Due to ongoing technical issues affecting connections to our servers, we’ve decided to suspend sales of our games in Russia. We don’t think it’s fair to sell a game in a region where we ca
Parallel Experiment - Patch 2.0.2
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 finis
Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-09-25.
| Genres | Adventure, Indie |
| Player tags | Puzzle · Co-op · Point & Click · Adventure · Comic Book · Escape Room · Story Rich · Narrative · Minigames · Mystery · Crime · Atmospheric (Steam store community voting) |
| Features | Multi-player · Co-op · Online Co-op · Cross-Platform Multiplayer · Steam Achievements · Family Sharing |
| Languages | English * , French, Italian, German, Polish, Russian, Simplified Chinese, Spanish - Latin America, Turkish * |
| Achievements | 26 |
| Official site | https://elevenpuzzles.com/parallel-experiment |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS *: Windows 7 Processor: Intel core 2 DUO 2GHz+, AMD Athlon TMX2 2.2GHz+ Memory: 4 GB RAM Graphics: Intel Hd graphics 520 Network: Broadband Internet connection Storage: 2 GB available space Additional Notes: A working PC-compatible microphone