Hwang began working on the script over a decade ago.
Hwang began working on his script in 2008 and finished the first draft of it in 2009. It took the writer and director nearly six months to write the first two episodes alone.
He told Radio Times that at the time the story felt “unfamiliar and violent” and he worried people would find it too abstract to be commercialized and find a wider audience.
The creator said he also struggled with funding and casting until Netflix picked it up about a decade later.
“But after about 12 years, the world has changed into a place where such peculiar, violent survival stories are actually welcomed,” he told The Korea Times.