# Project Blue Book: The Game — Hidden Mysteries > Hidden object adventure game based on declassified UFO investigations. (iPhone/iPad app by ThreeGates AB.) - Source: https://appshunter.io/ios/app/project-blue-book-the-game/id1445162277 (this page in markdown: same URL + `.md`) - Developer: [ThreeGates AB](https://appshunter.io/developer/967958276) - Category: Games, Adventure, Puzzle - Price: Free with in-app purchases - Rating: 4.20/5 from 30 App Store ratings · 17 written reviews indexed - Age rating: 12+ - Requires: iOS 11.0 · 216 MB - Languages: American English - Released: 2020-01-23 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/project-blue-book-the-game/id1445162277/reviews.md ## What is Project Blue Book? 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! ## Key features - Hidden object scenes - Puzzle solving - Witness interviews - Investigate real UFO cases - Exclusive game content - Based on HISTORY's series ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | The Vegas pack 100 coin | $0.99 | one-time | | Monte Carlo Pack 300 coins | $4.99 | one-time | | High Roller´s pack + 750 coins | $9.99 | one-time | | Unlimited Coffees + 300 coins | $4.99 | one-time | | A HEAD START | $1.99 | one-time | | SUPER STARTER PACK | $2.99 | one-time | | MEGA STARTER PACK | $3.99 | one-time | | ULTIMATE STARTER PACK | $15.99 | one-time | | EPIC STARTER PACK | $7.99 | one-time | | Billionaire Pack 15000 coins | $99.99 | one-time | ## Recent user reviews (10 of 17) All indexed reviews: https://appshunter.io/ios/app/project-blue-book-the-game/id1445162277/reviews.md ### 2/5 — Project blue book *2021-11-25, version 3.1* Enjoy the game but keeps freezing up past level 4. It won’t load. Had a hard time to load level 3 & 4. I’ll give it a 5 star review when the bugs get worked out. ### 3/5 — Project Bluebook *2021-10-02, version 3.1* Great game however I can’t load level 6, it just stops loading the graphics, the background music plays but it won’t finish loading the level. Have sent a message through the in game help section but get no reply. It would be nice if whoever monitors this game to get off their thumbs and fix this problem. If they would fix it I would give the game a higher rating. ### 3/5 — Won’t load scene 6 *2021-09-08, version 3.1* I get to scene 6 and it won’t load and I can’t skip it. I really liked the game until I got to this problem. fix it and I’ll give u 5 stars ### 3/5 — Project blue book *2021-06-23, version 3.1* I love the show I’ve watched both seasons & I love the game but the reason I’ve gave it 3 stars is bcuz ever since the update whenever I start on chapter 6 I hit play & it loads to the loading screen & I press the skip button but it won’t ever load!!! So freaking aggravating!!!! Fix this & I’ll gladly give it a 5 star rating! ### 5/5 — Great game I really liked the tv show. *2021-04-19, version 3.1* The game is great I finished the 103 in the story it wondering when the 4 storyline will be added I can’t wait to finish the game. ### 1/5 — Establishing Connection *2020-09-04, version 3.1* I get to play the intro. Then the games gets to 40%. It just gets stuck. Deleted and downloaded again. No change. ### 5/5 — Addictive fun - Updated and improved *2020-04-19, version 3.0* Earlier versions had a few issues, but as far as I can tell they've been corrected. The addition of daily quests lets you earn more coins for buying things with, and the ability to play the various mini-games on demand is a welcome improvement. The core of the game is still the hidden object challenges, and having the scoreboard for each scene encourages you to keep trying to beat your previous best score and climb to a higher ranking, but if you get tired of hunting for hidden objects then you can play one or more of the mini-games. **Developer response:** Hello! Thank you for your review. We are aware of those issues now and are working on them. You've been a great help going into detail about what wasn't working in our game. Regarding more content we hope the next case will be available within a month. ### 4/5 — Updates will add a 5th Star *2020-04-18, version 3.0* Wonderful game based on an amazing show. However, at the moment it is far too buggy to merit a 5 star rating. Some of the bugs are small like getting promoted to Master Sergeant, but the rank picture is a blank white rectangle instead of the appropriate rank graphic. Some are more frustrating like buying packs of cards, but having the game crash before the cards open and AFTER the coins are spent. The most troubling bugs involve completion progress; finish every part of a level, all stars, all missions, only to have it say 90% COMPLETE. It will highlight “NEW” mission objectives at the end of a case as though it has not been completed. I suspect they are simple fixes, and none are truly “game-breaking”, they are simply aggravating. You fail to feel that sense of completion, of satisfaction in beating a case. I also notice that the game is not entirely intuitive. For example, they have included a high score system for each stage. The problem is that I have no idea how to SEE those high scores without having to play through a level first. Silver coins accrue but I dont know what purpose they serve. Portions of the game are locked until further updates so perhaps the silver/copper currencies are going to have more utility in the future, but until then it is difficult to feel compelled to work towards 100% completion when you dont know what you are earning, nor will the game triggers actually “allow” a 100% completion at the moment. On the bright side it is free and I have beaten all available stages without spending a single real penny. It stays surprisingly true to the episodes and as a former Air Police (security forces) I love the addition of gate guards and AP members in the background of one of the cases. It gives you a good companion to the show if you are already a fan, but as far as hidden object puzzle games go it is on par with the rest. You will probably give it a satisfactory 3/5 if you dont watch the show, but in its current state it is definitely worthy of a solid 4/5 for Project Blue Book (ProBB) fans. As soon as the game gets some solid updates in the future I will eagerly add that 5th star. Thanks for reading and keep watching the skies. ### 5/5 — Review and question *2020-03-31, version 2.7* I loved the game great story telling I felt I was part of the show When will the next case be released? **Developer response:** Hi! Awesome to hear you are enjoying the game. We have been working on the new case and there is something exciting coming out soon! Stay tuned :) ### 5/5 — As Amazing As The Series *2020-03-18, version 2.7* This game is just amazing, it takes us back to season one of the series. The puzzles are amazing and really make you think. I’m looking forward to playing more of the game when it unlocks. If you love the television series you will love this game. I’m a huge fan of the series and I’m a huge fan of the game. You have to play this game. Now I will say during my play through so far I’ve noticed some bugs/glitches happen but any game will have those minor issues and they didn’t last long so don’t worry too much about it. **Developer response:** Hi! Glad to hear you enjoy the game. We try to fix any bugs/glitches when we encounter them and are constantly working on improving the game. Thank you so much for your review. ## Frequently asked questions about Project Blue Book ### What is Project Blue Book: The Game about? Project Blue Book: The Game is a free-to-play hidden object adventure game where players investigate real declassified UFO cases from the 1950s and 60s. You'll solve puzzles, conduct interviews, and uncover clues to find the truth. ### Is Project Blue Book: The Game free to play? Yes, Project Blue Book: The Game is free to play. It does not have in-app purchases or ads, making it a completely free experience. ### What devices can I play Project Blue Book: The Game on? Project Blue Book: The Game is supported on iPhone, iPad, and iPod. It is designed for iOS devices. ### What is the age rating for Project Blue Book: The Game? The age rating for Project Blue Book: The Game is 12+. This indicates it is suitable for players aged 12 and older. ### How often is Project Blue Book: The Game updated? The latest version of Project Blue Book: The Game is 3.1, which was last updated on July 28, 2020. This suggests updates may not be very frequent. ### Does Project Blue Book: The Game have multiplayer or offline play? The description does not mention multiplayer or offline play capabilities for Project Blue Book: The Game. It appears to be a single-player experience focused on story and investigation. ### What kind of puzzles can I expect in Project Blue Book: The Game? You can expect hundreds of puzzles, including hidden object scenes that challenge your observation skills and deduction tactics. The game also features witness interviews and story-driven elements. ### Who developed Project Blue Book: The Game? Project Blue Book: The Game was developed by ThreeGates AB. The game is based on HISTORY's hit drama series and features a story written by Steven-Elliot Altman. ## Version history (last 5 releases) ### 3.1 — 2020-07-28 Added Case 3 story line Added Gift box system General improvements and bug fixes ### 3.0 — 2020-04-14 Improved the card system. The process of activating cards is smoother. Polished the visual assets of the game. Reduced the texture sizes of some graphics. Improved the loading times. ### 2.9 — 2020-04-07 Fixes to graphics Fixed bug in the active leads panel Fixed bug with some cards not showing ### 2.8 — 2020-03-30 Improved Quest system. Fixed issues with the daily offers that couldn't be claimed. Fixed card inventory issues. General fixes to tutorials and menus. Improved performance and Loading times. Added a new minigame. ### 2.7 — 2020-02-07 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 ## Apps similar to Project Blue Book | App | Rating | Price | Category | | --- | --- | --- | --- | | [Labyrinths of World: Wild Side](https://appshunter.io/ios/app/labyrinths-of-world-wild-side/id1516584774) | 4.4 (109) | Free | Games | | [Christmas Spirit 2 - F2P](https://appshunter.io/ios/app/christmas-spirit-2-f2p/id1539389589) | 4.7 (386) | Free | Games | | [Hidden Object Fantasy Kingdom](https://appshunter.io/ios/app/hidden-object-fantasy-kingdom/id1427819643) | 4.5 (831) | Free | Games | | [Fairy Godmother - Dark Deal](https://appshunter.io/ios/app/fairy-godmother-dark-deal/id1529464814) | 4.7 (644) | Free | Games | | [Hidden Expedition: The Secret](https://appshunter.io/ios/app/hidden-expedition-the-secret/id1558660953) | 2.4 (17) | Free | Games | | [Chimeras: Cherished Serpent](https://appshunter.io/ios/app/chimeras-cherished-serpent/id1517365379) | 4.3 (16) | Free | Games | ## More apps by ThreeGates AB - [MainStream Fishing](https://appshunter.io/ios/app/mainstream-fishing/id970102800) - [No Limit Golf](https://appshunter.io/ios/app/no-limit-golf/id1194055466) - [Ca$h Cow](https://appshunter.io/ios/app/cah-cow/id1230603055) All apps by ThreeGates AB: https://appshunter.io/developer/967958276 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*