How many movies have Heiko Sikka and Ken Rüütel collaborated on?

They have worked on 4 movies together! Their first movie together was 1944 (2015) while their highest rated movie together was Melchior the Apothecary (2022). They have not worked together since Melchior the Apothecary: The Executioner's Daughter (2023). They are most known for their drama films together.