This document begins with general game tips then launches into the complete The Mystery of the Crystal Portal game walkthrough featuring Chapter 2 – Study Room · Chapter 3 – Japan · Chapter 5 – Guatemala. The Mystery of the Crystal Portal for iPad, iPhone, Android, Mac & PC! Embark on a brain-bending adventure that's full of unique hidden object fun! Help Nicole. Featuring innovative hidden object gameplay, an intriguing storyline, and stunning full-screen graphics, The Mystery of the Crystal Portal is a thrilling escape for.