Single-player games like Project Blue Book: Hidden Mysteries
Below are 9 single-player Steam games similar to Project Blue Book: Hidden Mysteries, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Project Blue Book: Hidden Mysteries page.
Ranked picks
- 1
Enchanted Stories: Mystic Woods Collector's Edition
Single-player alternative to Project Blue Book: Hidden Mysteries — playable solo, no multiplayer required. Shares Adventure and Casual with Project Blue Book: Hidden Mysteries.
The forest has eyes, and they’re on you! Embark on a quest to preserve an ancient woodland brimming with magical creatures and hidden objects!
- 2
Surface: Virtual Detective Collector's Edition
Single-player alternative to Project Blue Book: Hidden Mysteries — playable solo, no multiplayer required. Shares Adventure and Casual with Project Blue Book: Hidden Mysteries.
Where are the missing players?
- 3
Dark City: Paris Collector's Edition
Single-player alternative to Project Blue Book: Hidden Mysteries — playable solo, no multiplayer required. Shares Adventure and Casual with Project Blue Book: Hidden Mysteries.
The World Expo is coming to Paris!
- 4
The House of Tesla: Definitive Edition
Single-player alternative to Project Blue Book: Hidden Mysteries — playable solo, no multiplayer required. Shares Adventure with Project Blue Book: Hidden Mysteries.
Solve intricate puzzles to activate Nikola Tesla's creations, restore Wardenclyffe Tower, and unlock hidden devices in his New York lab. Explore the Chicago World's Fair in this mind-bending puzzle adventure.
- 5
Syberia: The World Before
Single-player alternative to Project Blue Book: Hidden Mysteries — playable solo, no multiplayer required. Shares Adventure with Project Blue Book: Hidden Mysteries.
Embark on a quest for identity through time, as you piece together the puzzle of two lives.
- 6
60 Minutes to Extinction: Escape Room
Single-player alternative to Project Blue Book: Hidden Mysteries — playable solo, no multiplayer required. Shares Adventure and Casual with Project Blue Book: Hidden Mysteries.
You have exactly 60 minutes to save humanity from nuclear extinction. There are no second attempts. No manual saves. Explore a collapsing bunker, repair critical systems, and solve puzzles under pressure. Succeed or watch the world end.
- 7
Mystery Case Files: Ravenhearst®
Single-player alternative to Project Blue Book: Hidden Mysteries — playable solo, no multiplayer required. Shares Adventure and Casual with Project Blue Book: Hidden Mysteries.
Rumors surrounding the history of stately Ravenhearst Manor have circulated for decades. The recently acquired diary of Emma Ravenhearst may hold the key to unraveling the tale behind this unsettling place, yet the pages are missing.
- 8
Detective Di: The Silk Rose Murders
Single-player alternative to Project Blue Book: Hidden Mysteries — playable solo, no multiplayer required. Shares Indie and Adventure with Project Blue Book: Hidden Mysteries.
A thrilling point-and-click adventure game where you play as Di Renjie, ancient China's most famous and gifted investigator, as he tracks a serial killer in the heart of the Tang Dynasty's capital city.
- 9
Legends of Aethereus
Single-player alternative to Project Blue Book: Hidden Mysteries — playable solo, no multiplayer required. Shares Indie with Project Blue Book: Hidden Mysteries.
The planet of Aethereus is an ancient and mysterious world filled with majestic forests, misty swamps, deep caves and ancient ruins. Devastated by three large astronomical events, the Three Great Skyfalls, it is a world just coming out of chaos and ruin.