Chapter XI: Floor Sixty-Four

You arrive at the tower of Starfall Corporation. You find a note with a simple message 'Floor Sixty-Four' - the Restricted Research Department. There must be some clues left behind that points to the last artifacts. It's time to start exploring Floor Sixty-Four! Will you be able to locate the last artifacts? --- Audience Recommended for 12+; younger players may require guidance from an adult. Designed to be played either solo or collaboratively, and takes an average of 60-90 minutes to solve, though players can work through them at their own pace. Difficulty Each Chapter of The CCC is supported by a dedicated digital hint library, allowing you to choose how many additional clues you receive. From subtle nudges all the way to complete solutions for each puzzle, it's up to you to choose your level of difficulty. —description from the publisher