Production was filmed throughout Victoria, Australia over a 17 month period between 2014-2016.
The house featured at the start of the movie was filmed in an abandoned racecourse club rooms, which hadn't been occupied since 1995.
There were two different Centurion vintage tanks used during the filming periods however because the interiors of each were too small for a camera crew, an interior set was constructed inside a riot water tanker to make it look like a tank.
All of the handheld weapons were modified water pistols and toy guns.
The mine scenes were filmed in a disused 19th Century coal mine in Wonthaggi, Australia.