Here is the full list of all 14 Tyd wag vir Niemand (Time waits for Nobody) achievements.
Complete the 6th level
Complete the 7th level
Complete the 3rd level
Complete the 4th level
Complete the 5th level
Complete the Introduction
Complete the 1st level
Complete the 2nd level
Complete the 8th level
Complete the 9th level
Complete the Secret level
Attain the "Bad" Ending
Attain the "Good" Ending
Attain both "Good" and "Bad" Endings