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Project Blue Book: Hidden Mysteries (PC) Steam Key GLOBAL
Eneba4.4•Activate on: Steam•Standard$3.86 Get -
Project Blue Book: Hidden Mysteries Steam CD Key
K4G3.8•Activate on: Steam•Standard$3.94 Get -
Project Blue Book: Hidden Mysteries PC Steam CD Key
Kinguin4.6•Activate on: Steam•Standard$4.27 Get -
Project Blue Book: Hidden Mysteries
Fanatical4.6•Activate on: Unspecified•Standard$5.60 Get-19% $6.99 -
Project Blue Book: Hidden Mysteries
Activate on: Steam•Standard$6.99 Get
About Project Blue Book: Hidden Mysteries
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 story elements and weaving in a lot of dialog, clues and other mini games. The visuals are beautiful and it’s all cohesive so you feel like you are in that late 1940s to early 1950s era.” – Brandon Jones, San Mateo, CA
Game Specifications
System Requirements
Windows
Minimum
- OS *: Windows 7 (64-bit version)
- Processor: 1.5 Ghz
- Memory: 2 GB RAM
- Graphics: 512 MB
- DirectX: Version 9.0
- Additional Notes: Storage 1.5 GB
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Price History
Frequently asked questions about Project Blue Book: Hidden Mysteries
What is the cheapest price for Project Blue Book: Hidden Mysteries Steam key?
The cheapest redeemable Steam key currently listed is $3.86 at Eneba. Prices were last checked on November 14, 2026.
View key offersWhat is the difference between key and account offers for Project Blue Book: Hidden Mysteries?
Gamescade currently lists 5 redeemable keys and no account offers. A key is redeemed on your own account, while an account offer provides access to a separate account containing the game.
View key offersWhat are the PC system requirements for Project Blue Book: Hidden Mysteries?
Minimum PC requirements for Project Blue Book: Hidden Mysteries include a 1.5 Ghz CPU, 2 GB RAM, and a GPU with 512 MB. See the full requirements below.
What is the Project Blue Book: Hidden Mysteries release date?
Project Blue Book: Hidden Mysteries was released on March 15, 2021.
Where can Project Blue Book: Hidden Mysteries offers be activated?
Current Project Blue Book: Hidden Mysteries key offers can be activated on Steam. Check the retailer page for region restrictions before buying.
Which platforms have active Project Blue Book: Hidden Mysteries deals?
Gamescade currently lists active Project Blue Book: Hidden Mysteries deals for PC.
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