Here is the full list of all 52 'n Verlore Verstand achievements.
Beat the Time Trial for Scene 3
Beat the Time Trial for Scene 8
Beat the Time Trial for Scene 9
Beat the Time Trial for Scene 14
Beat the Time Trial for Scene 15
Beat the Time Trial for Scene 16
Beat the Time Trial for Scene 17
Beat the Time Trial for the Secret Level
Collect all Achievements
Beat the Time Trial for Scene 5
Beat the Time Trial for Scene 10
Beat the Time Trial for Scene 11
Beat the Time Trial for Scene 12
Beat the Time Trial for Scene 13
Activate and DeActivate a Lever more than 5 times in a row
Beat the Time Trial for Scene 6
Beat the Time Trial for Scene 7
Beat the Time Trial for Scene 18
Find the Secret Level
Finish the Secret Level
Find all 10 White Daisies
Find all the Flowers
Beat the Time Trial for Scene 1
Beat the Time Trial for Scene 2
Beat the Time Trial for Scene 4
Find all 10 Pink Sword Lilies
Find all 10 Orange Tulips
Finish Scene 12
Finish Scene 13
Finish Scene 14
Finish Scene 15
Finish Scene 16
Finish Scene 17
Finish Scene 18
Find all 10 Blue Poppy Flowers
Find all 10 Red Poppy Flowers
Find all 10 Purple Thistles
Finish Scene 9
Finish Scene 10
Finish Scene 11
Die more than 10 times in a row before reaching the end of a level
Stay still in one place for more than 10 minutes
Finish Scene 1
Finish Scene 2
Finish Scene 3
Finish Scene 4
Finish Scene 5
Finish Scene 6
Finish Scene 7
Finish Scene 8
Find a Flower
Jump in place for more than 5 times in a row