Buy Project Blue Book: Hidden Mysteries PC key
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About Project Blue Book: Hidden Mysteries
Project Blue Book: Hidden Mysteries is a hidden object adventure set in 1952. As a newly recruited agent in the U.S. Air Force’s top-secret Project Blue Book investigation, you examine real declassified UFO sightings and search for the truth behind them.
Investigate UFO cases
You solve hundreds of hidden object scenes, puzzles and minigames, using observation and deduction to work through the cases. The story is based on declassified UFO investigations and follows you as you investigate alongside Dr. J. Allen Hynek and Captain Michael Quinn.
Project Blue Book
The game is based on the television drama Project Blue Book, which explores the U.S. Air Force’s top-secret UFO investigations from 1952 to 1969. Its story was written by Steven-Elliot Altman.
Frequently asked questions
The best price for Project Blue Book: Hidden Mysteries is $3.93 at Eneba. That is 43% less than on Steam, where it costs $6.99. 5 shops have an offer that activates in your country.
Some are. This page only shows offers that activate in your country; offers for other regions, or with no stated region, are left out. To see the offers for another country, change your country at the top of the page.
Every key we list activates on Steam. Redeem the key there and Project Blue Book: Hidden Mysteries stays in your library for good.
Yes, with a small risk. Publishers create keys to sell in other shops, which is why a key can cost less than in the official store, and once you activate it the game is yours to keep, just like a store purchase. On average 1–2% of keys fail, so check the shop's buyer protection before you buy: the official store does not refund keys bought elsewhere.
The minimum requirements for Project Blue Book: Hidden Mysteries are: Windows 7, 2 GB RAM. It runs on Windows only. The recommended specs are in the System requirements section.
No. Project Blue Book: Hidden Mysteries is a single-player game.
Yes. Project Blue Book: Hidden Mysteries is the full base game. You need nothing else to play it.
Buy Project Blue Book: Hidden Mysteries 43% cheaper than on Steam.
Project Blue Book: Hidden Mysteries is available for 43% less in shops such as Eneba, K4G, or Kinguin.
Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.
Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.











