Project Blue Book: Hidden Mysteries Steam Charts, Sales, Players & Wishlists

Project Blue Book: Hidden Mysteries is tagged as Adventure, Casual, Indie. It is published by Three Gates (developer) and Legacy Games (publisher) and released on 15 Mar, 2021. PureGameStats tracks Project Blue Book: Hidden Mysteries's live Steam player count, all-time peak, review sentiment, estimated sales and price history. Project Blue Book: Hidden Mysteries's recorded all-time peak is 1 concurrent players on 04 August 2025. PureGameStats estimates 72 Steam units sold. Steam reviews are 67% positive across 6 responses. Platforms: Windows.

Games Project Blue Book: Hidden Mysteries

Project Blue Book: Hidden Mysteries Steam Charts, Sales, Players & Wishlists

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. Test your observation and investigation skills in this out-of-this-world hidden object adventure!

Developer
Three Gates
Publisher
Legacy Games
Platforms
Windows
Release Date
15 Mar, 2021
Official site On Steam
Est. Sales
72
PGS estimate
Current Steam Price
$6.99
Store data Standard Edition
Estimates are modelled by PureGameStats using multiple data signals. Direct data is sourced from Steam. View methodology →

Project Blue Book: Hidden Mysteries Concurrent Players Updated hourly

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Project Blue Book: Hidden Mysteries header image
Developer: Three Gates
Publisher: Legacy Games
Platforms: Windows
Release Date: 15 Mar, 2021
Est. sales: 72
Retailer Price (US) Discount
Steam $6.99 0%

Pricing History & Best Deals

View on Steam

Historical pricing on Steam (US).

$6.99
Steam Launch Price
Steam
$6.99
Steam Current Price
Steam
$6.99
Steam Lowest Price
Steam
$6.99
Lowest Recorded
Steam
$6.99
Current Lowest Price
Steam →
Steam Prices Around the World
Live Steam pricing across 27 currencies we track.
View all prices Hide prices
AU
A$ 9.95
BR
R$14,49
CA
C$ 7.99
CH
CHF 7.25
CL
CLP$3.300
CN
¥28.00
DE
5,69€
GB
£5.19
HK
HK$ 38.00
ID
Rp 52 999
IN
₹259.00
JP
¥720
KR
₩ 7,500
MX
Mex$ 82.49
MY
RM17.50
NO
52,00 kr
NZ
NZ$ 8.89
PH
₱219.95
PL
25,49 zł
RU
175 руб
SG
S$7.50
TH
฿139.00
TR
$6.99
TW
NT$ 138.00
US
$6.99
VN
90.000₫
ZA
R 58.00

Newest snapshot: 16 Sept 2026.

Project Blue Book: Hidden Mysteries Steam Reviews

Total reviews 6 Positive 4 Negative 2 Positive % 66.7%Rating 6 user reviews
PC System Requirements
Minimum and recommended hardware needed to run Project Blue Book: Hidden Mysteries.
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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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Frequently Asked Questions
Find quick answers about release date, pricing, platforms and more.
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What is the all-time peak player count for Project Blue Book: Hidden Mysteries?

Project Blue Book: Hidden Mysteries reached an all-time peak of 1 concurrent players on 04 August 2025.

How many copies has Project Blue Book: Hidden Mysteries sold on Steam?

PureGameStats estimates Project Blue Book: Hidden Mysteries has sold approximately 72 copies on Steam, with low confidence. The estimate is derived from Steam reviews, concurrent player peaks and achievement completion rates.

How is Project Blue Book: Hidden Mysteries rated on Steam?

Project Blue Book: Hidden Mysteries has 6 Steam reviews with a 66.7% positive rating (6 user reviews).

What is the current price of Project Blue Book: Hidden Mysteries?

Project Blue Book: Hidden Mysteries is priced at $6.99 on Steam. Full price history and best deals are tracked on this page.

When was Project Blue Book: Hidden Mysteries released?

Project Blue Book: Hidden Mysteries was released on 15 Mar, 2021. It was developed by Three Gates.

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