The soundtrack for Squid Game (Soundtrack From The Netflix Series) by Jung Jae-il is a masterful composition that intricately weaves traditional Korean instruments with contemporary orchestral elements. The track "Way Back Then" employs elementary school instruments like recorders and castanets, creating a nostalgic yet unsettling atmosphere that mirrors the show's themes. The use of the 3-3-7 clapping rhythm, common in South Korea, adds a cultural depth that resonates with the audience.

Jung Jae-il's collaboration with composers Park Min-ju and Kim Sung-soo (also known as "23") brings a diverse range of musical styles to the soundtrack. The a cappella piece "Pink Soldiers" stands out with its haunting melody, contributing to the eerie ambiance of the series. The inclusion of classical pieces such as Haydn's "Trumpet Concerto" and Strauss's "The Blue Danube" juxtaposes the brutal visuals, enhancing the psychological impact on viewers.