Project Blue Book: Hidden Mysteries overview

Overview

Project Blue Book: Hidden Mysteries comes from Three Gates and is published by Legacy Games. It arrived on Steam on Mar 15, 2021, and it sits naturally among Single-player, Steam Achievements, and Family Sharing. SteamPulse tracks it across Windows and Steam so readers get a quick useful snapshot, not just a wall of numbers.

Players and reviews

Project Blue Book: Hidden Mysteries's latest SteamPulse observation recorded 0 players at 22 September 2026 - 07:40:47 UTC, with a tracked peak near 2. This peak is the highest value in the available SteamPulse record and may not include activity before tracking began. Player reaction is 67% positive across 6 reviews.

Language and system requirements

Project Blue Book: Hidden Mysteries is available in 1 languages including:

3 regional rating boards including dejus, steam germany, and igrs

Sales, recommendations, and streams

Project Blue Book: Hidden Mysteries has sold up to 180 units and has recommendation data pending. The estimated VGI revenue is $788. On Twitch, 0 streamers are live with around 0 total watchers.

Project Blue Book: Hidden Mysteries overview details

Project Blue Book: Hidden Mysteries combines live player counts with reviews, pricing, platform support, Store metadata, dated player history, media, recent news, and related games.

Steam Store description

Search for clues and investigate real declassified UFO cases to find the truth! It’s 1952, and the U.S. Air Force is operating a top-secret investigation: Project Blue Book . As a newly recruited agent, it’s your job to uncover the truth behind these real declassified UFO sightings. It’s your chance to investigate flying saucers in the world's first Unidentified Flying (Hidden) Object Game! Game Features ● Challenge your observation and deduction skills! ● Experience chilling mysteries based on real declassified UFO investigations! ● Solve hundreds of hidden object scenes, puzzles and minigames! ● Investigate alongside Dr. J. Allen Hynek (played by Aidan Gillen from “Game Of Thrones”) and Captain Michael Quinn (played by Michael Malarkey from “The Vampire Diaries”)! About Project Blue Book: Hidden Mysteries Project Blue Book: Hidden Mysteries is the official hidden object adventure game based on HISTORY’s hit drama series PROJECT BLUE BOOK, created by David O'Leary, and executive produced by Academy Award and Golden Globe® winner Robert Zemeckis. The series explores the historical Top Secret investigations into UFOs conducted by the U.S. Air Force between 1952 and 1969. The game's story is written by bestselling science-fiction author and award-winning game writer Steven-Elliot Altman, best known for similar social games like PEARL’S PERIL and ANCIENT ALIENS. Highly Rated by Players Like You! “Great puzzles. This is a fast game that keeps the brain clicking along the whole way.” – Carl Jaynes, NYC, New York “Very successful at connecting the items in each level to the…

SteamPulse editorial summary

Project Blue Book: Hidden Mysteries is listed as a game with $6.99. It supports Windows, belongs to Single-player, Steam Achievements, and Family Sharing, and is associated with Adventure, Casual, and Indie. SteamPulse's latest observation records 0 players at 22 September 2026 - 07:40:47 UTC, a tracked peak of 2, and 67% positive reviews.

Highlighted achievements

Support and legal notes

Real questions answered from SteamPulse data, including live players, monthly momentum, review sentiment, regional audience signals, Twitch activity, and current Steam pricing.