Harry Katsilis has a particular interest for video game and film music, especially for animated films. He has composed music for indie projects, including video games and theatrical plays, including Human is Me by Antonia Vasilakou, which was performed at the National Theatre of Greece (2015). In March 2019, he composed a piece for contemporary ballet, recorded by the Athens Symphony Youth Orchestra (conducted by Pavlos Sergiou and Alexandros Sofronis). A video recording of the choreography along with the music was shown at SNFCC.