The robots were inspired by the ED-209 robot from _RoboCop (1987).
Much of the game's content makes reference to Greek mythology or history.
Due to the game's emphasis on allowing players the ability to search for different solutions to problems, it is actually possible to complete Deus Ex without drawing a gun.
Warren Spector wasn't very fond of the opening music. He was planning to tell the composer to come up with something else, but discovered that he couldn't get the tune out of his head. This convinced him to leave it as was.
The entire game takes place at night - apart from when the helicopter picks you up at the end of the Hong Kong missions, which occurs in daylight.