Achieved the bad ending with Atrus.
Returned to Myst Island from D'ni.
Achieved the good ending.
Achieved bad ending with Sirrus.
Achieved bad ending with Achenar.
Solved the fireplace puzzle.
Found a way back from Selenitic.
Solved the generator power puzzle.
Found the white page.
Found a way back from Channelwood.
Found to Sirrus' message to Achenar.
Opened the safe in the cabin.
Found a way back from Mechanical.
Found the skeleton in the Mechanical Age.
Found a way back from Stoneship.
Solved the compass puzzle.
Raised the sunken ship.
Viewed some dated constellations.
Solved the gear puzzle inside of the clocktower.
Fill up all of the shelf space for the Red or Blue pages.
Achieved the good ending without inserting a single red or blue page.
Solved the piano puzzle in a single try.
Rode the tree to the highest position.
Made it through the maze in Selenitic without pressing "backtrack" on a randomized playthrough.
Achieved one of the brothers' endings while on a randomized playthrough.
Achieved the good ending within two minutes.