Search for clues and investigate real declassified UFO cases to find the truth!

Project Blue Book The Game: Hidden Mysteries is the official, free-to-play, 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. 

In Project Blue Book The Game: Hidden Mysteries, you will start off as a newly recruited agent in Project Blue Book during the 1950s, under the guidance of the show's lead investigators, Dr. J. Allen Hynek (played by Aidan Gillen from “Game Of Thrones”), and Captain Michael Quinn (played by Michael Malarkey from “The Vampire Diaries”), and begin to investigate real declassified UFO investigations to find the truth! 

Hundreds of puzzles, witness interviews and hidden object scenes will challenge your observation and deduction tactics as you investigate alongside your favorite characters into many of the cases you loved from the series, uncover exclusive new content, and explore new cases that can only be found in the game! The game's story is written by bestselling science-fiction writer and award-winning game writer Steven-Elliot Altman, best known for similar social games like PEARL’S PERIL and ANCIENT ALIENS.

We're here to find the truth! So, come help us investigate flying saucers along with Dr. Hynek in the world's first Unidentified Flying (Hidden) Object Game!

What’s New

Version 2.7

Updates to some Card text descriptions
Text fixes to dialogues
Story dialogue order changes and updates
Removed the redaction mini-game at the end of Case 100
Case 100 now shows 100% completion with the two scenes and all stars
The ability to use hints in Case 101 Cold Storage has been added to the game
Store offerings are flexible with showing special text with a red badge
Fixes with purchasing hints
Fixes with purchasing coffee

Ratings and Reviews

4.9 out of 5
11 Ratings

11 Ratings

Brandonjones ,

High quality game with lots of story polish

Project Blue Book is, at its core, a hidden object game, but it is 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, and it’s reinforced all over the game. I haven’t gotten that far in yet, but I can already see based on the main screen that there are tons of locations and perhaps more game types.
There aren’t many games with Robert Zeneckis’ name on it and the quality seems much higher than other hidden object games I played.

Gruff'n'Stuff ,

Addictive fun

I've never played any "find the hidden objects" games, but this is more than just a hidden objects game-- there are other types of mini-games woven in. It's fun to play, and surprisingly addictive.

elwin11 ,

Love the show and the game

Great visuals and gameplay - would highly recommend!😎


ThreeGates AB
199.8 MB

Requires iOS 13.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Infrequent/Mild Alcohol, Tobacco, or Drug Use or References
In-App Purchases
  1. The Vegas pack 100 coin $0.99
  2. Monte Carlo Pack 300 coins $4.99
  3. High Roller´s pack + 750 coins $9.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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