Here is the full list of all 10 Marble Muse achievements.
Found the hidden chamber
Completed all proof of concept levels.
Completed all prototype levels.
Completed all product levels.
Received a gold medal on all levels.
Received a platinum medal on all levels in challenge mode.
Found the hidden marble in all levels.
Found all the red stars in all levels.
One-hundred percent the game. Check your progress in the credits.
Quitting in frustration is such sweet sorrow when you receive an achievement for it.