Soldier was written by David Peoples, who co-wrote the script for Blade Runner. By his own admission, he considers Soldier to be a "sidequel"/spiritual successor to Blade Runner. It also obliquely references various elements of stories written by Philip K. Dick (who wrote the novel "Do Androids Dream of Electric Sheep?", on which Blade Runner is based), or film adaptations thereof. A "Spinner" vehicle from Blade Runner can be seen in the wreckage on a junk planet that features in the film.
There are also several dialogue references to events such as "Tanhauser Gate" from Blade Runner.
Read more about this topic: Soldier (1998 American film)