Meant To Be A Movie
Hwang actually wrote the script to be a movie at first, but then he realized it would work better as a serialized story, which meant it was better for a TV format. Having multiple episodes meant he could delve into the relationships between the characters as well as more details of the deadly games of the show.
Not In The Original Script
Turning Squid Games into a TV format also allowed Hwang to give the audience more subplots, including Jun-ho’s undercover cop plot line. It’s interesting that his character becomes a central one and even helped Wi ha-joon become well known as a serious dramatic actor.