'Upgrade' trivia and fun facts
Hume Freeway
Part of the film is filmed on the Hume Freeway in Cragieburn, Melbourne, Australia.
Linux
The chip is running Linux, as is shown by the shutdown command "sudo shutdown -h now", which should be taken as an in-joke.
Australia
Despite being filmed in Australia the movie is set in the United States as evidenced by the interstate highway sign during the police car chase.
James Wan's reference
When Gray is entering the apartment block to find "Jamie", he pauses at some apartment buzzers. One of them says "J. Wan" - James Wan has been Leigh Whannel's main collaborator since the first "Saw" film.
STEM
The film was originally titled "STEM".
First title
The film was originally titled "Stem".
Saw reference
During the various scenes involving the hacker Jamie's building, a painting of Billy the Puppet (from the Saw franchise) can be seen on the wall.