The South Korean program, the most popular in Netflix's history, centres around a fictional game show in which poverty-stricken characters compete in a series of death games to win a $50million cash prize.
It features gruesome scenes of characters being shot in the head and others having their organs harvested.
The show is not meant to be seen by young children.
A scene from Netflix show Squid Game, which Australian schools have warned is being copied by children as young as six
Primary school children saythey have watched Squid Game, which is rated MA, meaning it is meant only to be seen by a mature audience
As kids in NSW return to school after lockdown, it is feared many of them will have had unsupervised access to violent streaming TV shows while spending months at home.
One Sydney school principal was so concerned about Squid Game and other violent shows she penned a letter to parents.
'Squid Game features scenes that depict extreme violence and gore, strong language and frightening moments that are, according to its rating, simply not suitable for primary and early high school aged children,'