The John Kruger role was originally offered to Sylvester Stallone. He absolutely hated the script, turned the offer down and instead starred in Copland (1997).
The company name "Cyrez" was originally "Cyrex", but the real-life company Cyrix (a microprocessor developer, now defunct) complained. The movie had been shot, but all dialogue was dubbed and company logos were digitally altered during post-production. In one scene where Kruger and Lee review the files on the disc in Donohue's office, some of the files have names beginning with CYX, indicating Cyrex.
Chuck Russell looks back fondly on his experience making the film. "It's a crowd-pleaser. It's still fun to watch."
Cinematographer Adam Greenberg was personally chosen for the job by Arnold Schwarzenegger, who had worked with him on the first two Terminator movies. Schwarzenegger assured the production that if they wanted an experienced, professional cameraman who could capture the action on the film's hectic schedule that Greenberg was the man for the job.
Director Chuck Russell and producer Arnold Kopelson had a rocky relationship during the entire production. The only reason the film was able to go forward and ultimately be completed was that Arnold Schwarzenegger got along with each man separately, and was able to negotiate schedules and logistics at a point where the two men refused to speak to each other.
Sven-Ole Thorsen: Arnold Schwarzenegger's friend and frequent collaborator appears as a gunman towards the end of the film. He can be seen standing next to Petrofsky, wearing a blue jacket and firing a semi-automatic rifle.