What's Missing? Achievements Here is the full list of all 20 What's Missing? achievements.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc What are achievement flags? Click to find outApply Bargaining Denial Depression Anger Cat killerBurn the cat statue in the fireplace Early bird catches the... appleFind a shortcut in the planetarium Again the apple?Find a shortcut in the Garden area Steal my breath awayDie in the planetarium Who needs (ch)air anywayType air instead of chair in the Tower area Icarus flew too close to the sunDie from the sun Let it burnDie from the fire QUACK!Ride the mother duck when they are big Seeker of deathsDie in every area (except the last area) Potion of deathMake an object dissapear by dropping it in the cauldron The library is closedAll the books in the planetarium have been burned SpeedrunnerComplete the game within 15 minutes Acceptance Chasing The PastFind all of Vivienne's apparitions Going In CirclesLooping more then 100 times Power of the WindJump onto the island where the windmill is located