Here is the full list of all 34 realMyst: Masterpiece Edition achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Found way back from Rime Age
Ending with Sirrus freed
Ending with Achenar freed
Used all power breakers
Ride tree to the very top
Ride tree up from the bookroom below
Viewed all dated star patterns
Found dagger in the crows' nest on ship
Get up on Sirrus' bed in Channelwood
Found skeleton in Mechanical Age
Hide behind the plant in Sirrus' room in Stoneship
Found padlock and key at the bottom of the lighthouse in Stoneship
Viewed a crystal combination
Controlled the Aurora
Finished Myst with best ending
Found white page inside
Ending trapped in D'ni Age
Rotated the fireplace
Finished maze puzzle in Selenitic Age without pressing
Solved sound puzzle in one try
Wound the toy bird too tight
Found way back from Channelwood Age
Watch Sirrus' message on Achenar's imager
Opened safe in cabin
Found way back from Selenitic Age
Perfectly tuned antennas in Selenitic Age
Found way back from Stoneship
Raised sunken ship
Solved generator puzzle in power house
Found way back from Mechanical Age
Sat in one of the thrones in Mechanical Age
Solved gear puzzle inside clocktower
Found the panel inside the inside panel
Visit Ti'ana's grave