Project Introduction


Parallel Experiment is the second standalone chapter to the cooperative point-and-click puzzle game series 'Cryptic Killer'.

After getting tricked by the Cryptic Killer in Unboxing the Cryptic Killer, detectives Old Dog and Ally are back on the quest to capture the infamous criminal. A series of cryptic clues leads them across the city taking them closer to uncovering his latest ominous scheme: the Parallel Experiment. While the detectives are uncertain about Cryptic Killer's exact plans, they know they must act fast to stop him.

As they navigate this maze of clues, one question remains: Are they closing in on the Cryptic Killer, or walking into yet another one of his traps? Determination is high—this time, they're not letting him get away.


Two minds are better than one, and the only way you'll be able to catch the Cryptic Killer codes is by working together. Through separate screens, you and your friend will each be given half of a puzzle at each location. Communicate, collaborate, and work together to push your puzzle-solving skills to the limit.


- Two Player Co-Op
In Parallel Experiment, the detectives are separated. You’ll see different items and clues than your partner and will be tested on your communication!

- Challenging Collaborative Puzzles
Two brains are better than one when it comes to cracking the Cryptic Killer's codes.

-Explore Illustrated Worlds
Parallel Experiment's hand-illustrated environments are inspired by noir novels.

-Draw on… Everything!
You cannot solve a case without taking notes. At any time in the game, you can whip out a notebook and pen to make notes and scribble on your environment.

About Developer

The story of Eleven Puzzles is simple. Six friends, who love games and puzzles that decided to create an online escape room that will challenge, excite and entertain all who play.

But after making two online escape rooms, we wanted more. That's why we decided to make Unsolved Case - our first standalone game.

From there things went wild, people loved Unsolved Case, and Unboxing the Cryptic Killer which we made right after. Our community was formed and is still growing.

Our team grew, and holds 8 amazing people today. Now we're working on Parallel Experiment, a game that we always wanted to make, one of the best puzzle/escape room games on the market.

We're closely connected to the European indie games scene. Our main characters are Old Dog (from Poland) and Ally (from Scotland). Today our team is fully Poland-based but we started as a half-Polish, half-Scottish team.