THE BOOK OF KNOWLEDGE

Contains adsIn-app purchases
Content rating
Everyone
10+
Downloads
Content rating
Everyone
Mild Fantasy Violence
Learn more
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About this game

THE BOOK OF KNOWLEDGE is an atmospheric game about memory, logic, attention, and knowledge.

A mysterious alien arrived from another galaxy as the guardian of the Book of Knowledge — an ancient source of civilization memories.

This knowledge cannot be given to everyone. It must be earned by someone who can prove the power of memory, attention, and intelligence.

For this mission, the alien selected seven helpers on Earth. Each of them prepared unique rooms and challenges for you to complete.

Remember objects before time runs out, answer questions, and unlock new doors.

But these trials are not only about the Book of Knowledge.

By completing them, you activate interstellar portals that allow ships from this civilization to continue their journey toward other intelligent worlds.

The portals cannot remain open for long and will close immediately after passage.

Only those who complete every memory challenge and help the civilization move forward will gain access to the Book of Knowledge.

Game Features:

• remember objects before time runs out
• answer memory and attention questions
• solve logic challenges
• explore different rooms and tasks
• 7 unique characters
• atmospheric sci-fi story
• interstellar portals
• memory and brain training

Will you complete all the challenges and gain access to the Book of Knowledge?
Updated on
Jun 22, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App info and performance and Device or other IDs
This app may collect these data types
App info and performance and Device or other IDs
Data is encrypted in transit
Data can’t be deleted

What’s new

• Restored the option to purchase the ad-free and offline version.
• Fixed an issue in Room5 where buttons and UI elements could stop responding to touches.