Parallel Experiment for Windows

Parallel Experiment — a cooperative noir puzzler

Parallel Experiment is a stylish two-player cooperative puzzle adventure from Eleven Puzzles. It serves as a standalone follow-up in the Cryptic Killer saga, continuing the investigation led by detectives Old Dog and Ally as they pursue a mysterious antagonist. The game leans heavily on communication and teamwork, with a free demo available for players who want to try it first.

Core gameplay and presentation

• Players experience complementary but separate screens: each player sees different clues, objects and perspective, so progress depends on clear, ongoing communication.
• The puzzles resemble escape-room challenges and were designed specifically for co-op interaction, encouraging players to describe findings and coordinate actions to advance.
• Visuals are hand-illustrated with a comic-noir aesthetic inspired by classic noir fiction, lending a moody, stylized atmosphere to the city and characters.

Platforms and requirements

Parallel Experiment is available for PC and mobile. Because of its cooperative nature, every participant must own a copy on their chosen platform. A demo version is provided for those who want to sample the game before purchasing.

Strengths and limitations

• Strengths: The narrative-driven structure, the cooperative puzzle design, and the distinctive noir art direction combine to create an engaging, character-focused experience for fans of two-player mystery games.
• Limitations: Some puzzles skew toward the easier end of the spectrum, which may disappoint players seeking more demanding challenges. The mystery’s impact also diminishes after a single complete playthrough, reducing replay value.

Update highlights (patches 1.0.1–1.0.4)

• Patch 1.0.4 — Added menu credits and fixed several rare issues, including a split in the elevator maze, problems with stacked books, and levers that could appear off-screen on iPad devices.
• Patch 1.0.2 — Introduced manual server selection, lowered graphics load in very large areas to reduce crashes, enabled automatic save backups, retained language selection across sessions, and added reset options for the Pipe and Gears & Sliders puzzles; also included localization and minor visual fixes.
• Patch 1.0.3 — Focused on performance improvements and expanded graphics settings; resolved occurrences of save file loss and corrected various minigame bugs.
• Patch 1.0.1 — Prioritized stability and connectivity by adding servers (including Hong Kong and Tel Aviv), fixing backup server connections, addressing critical gameplay bugs (such as preventing illegal moves in Guliver’s game and an unsolvable Gears & Sliders state), and correcting sound controls and map switching in Investigation Mode.

Together these updates improve stability, performance, and accessibility across platforms.

Closing impression

Parallel Experiment is a well-crafted cooperative mystery that shines when two players collaborate and enjoy its noir atmosphere and bespoke co-op puzzles. While its limited difficulty ceiling and one-play mystery reveal may reduce longevity for some, it remains a compelling pick for players who value story-driven, communication-focused puzzle adventures.