Here is the full list of all 28 Verlet Swing achievements.
Complete Crimson Court
I beat the final level and all I got was this crappy achievement
Complete a challenge
Complete Wondercon 1998
Complete Nimis Non Laute
Complete Mobymart
Create your first level
Publish your first level
Hook something extremely far away
Reach more than 130 km/h
Earn your first perfect ranking
Complete Checkmate, History
Die more than 50 times on a level in a single go
Die while moving really fast
Earn half of all available perfect rankings
Earn all available perfect rankings
Earn all perfect rankings in Checkmate, History
Earn all perfect rankings in Mobymart
Earn all perfect rankings in Nimis Non Laute
Earn all perfect rankings in Wondercon 1998
Earn all perfect rankings in Crimson Court
Complete half of all available challenges
Complete all available challenges
Complete the Hardcore Marathon challenge
Find the Julbock’s hidden entrance!
Enter through the goat eye in The Depths
Earn all achievements
Complete the Marathon challenge under 15 minutes