When Rico, Carmen and Carl meets with the recruiting officer after pledging, and the officer shakes hand with Rico, it is revealed that he has lost both his legs. This is not done with any means of special effect or other trickery, as Robert David Hall - the actor - had both legs amputated after an accident in 1978.
When Carmen Ibanez is taking the starship out of dock the first time, she flicks a switch to release the hoses attached to the docking platform. That switch is the power switch from a 1982 era IBM PC, the very first PC to see widespread use in home and office.
Most of the arachnids appearing on film are CGI but a few life-sized, robotic models were built. However, during the battle scenes, the actors wound up looking at director Paul Verhoeven himself who would stand in front of them and jump and scream to elicit their reactions.
In the German version the news commentator you hear all the time was dubbed by Egon Hoegen. This results in additional comic relief because he is the man who, with his rather dry and sarcastic voice, narrates every episode of Der 7. Sinn (1966) (a very well known traffic education show).
Most of the adults in authority positions in the movie are scarred in some way: Rasczak (Michael Ironside) lacks an arm; the biology teacher has scars on her face; and the recruiting sergeant has lost both his legs. Verhoeven included them as a symbol of the belligerent history of the Federation.
This movie, along with RoboCop (1987), Basic Instinct (1992), Showgirls (1995) and Hollow Man (2000) is one of five separate movie franchises in which the first movie of their respected series (directed by Paul Verhoeven) were successful, but their respected sequels (not directed by Verhoeven) all either bombed at the box office or were released 'Direct-to-DVD'.
In the movie, Jonny Rico and some of the characters' nationalities have been significantly altered from the original novel. In Heinlein's novel, the story focuses on the first-person narrative of Juan "Jonnie" Rico, a son of a wealthy Filipino family who enlisted in to the Mobile Infantry - a highly futuristic military unit equipped with powered armor and an arsenal of advanced weaponry. The movie, instead of an elite fighting force equipped with Powered Suits, they are a conventional army armed with conventional weapons - but apparently without armored vehicles, artillery, most heavy weapons, and other vital equipment.
The base which houses the Fleet Academy is named "Tereshkova" after Russian cosmonaut Valentina Tereshkova, the first woman in space. There are many more examples in the movie of the future being gender-neutral (meaning there is no bigotry based on gender), such as the mixed-shower scene and the female captain.
During the scene at Whiskey base where the general is discovered in a "closet". The prop used for the closet was actually an industrial refrigerator found very commonly in the kitchens of most restaurants.
Fort Ticonderoga is a real fort in upstate New York that was active during the mid 18th century. It was used during the 7-years war with the French and then again during the American Revolution against the British by American troops.
The German dubbing of this film, although changing a lot of the political issues of the story, is partly regarded as cult especially due to lines like "Das ganze Gehirn weggelutscht" ("They sucked his brains out") as performed by Joachim Kerzel.
In the movie credits, Amy Smart's character is identified as "Pilot Cadet". However, the FedNet announcer refers to her as "Lieutenant Stack Lumbrezer". One of the movie's co-producers is Stacy Lumbrezer.
The heavy weapons mounted on towers featured in the bug assault on the base at Planet P were Degtyaryov-Shpagin Krupnokalibernyi DShK's ("Degtyaryov-Shpagin Large Caliber"), in a twin-gun arrangement on a gimbal mount. The DShK was designed in the Soviet Union in the 1930's and fires a 12.7x108mm cartridge, roughly the Soviet equivalent of the American .50 Cal BMG.
The classroom walls display portraits of major philosophers; Aristotle, Baruch Spinoza, Friedrich Nietzsche and Hannah Arendt. All these thinkers are known for their influence on politics and political theory. Arendt notably worked on totalitarianism, an important theme of the movie.
In the shower scene, Shujimi (Anthony Ruivivar ) says that he joined the Mobile Infantry so that the Federation would pay for his studies, which would otherwise have cost him 'an arm and a leg'. Shujimi later has his limbs ripped off by the bugs.
Several references are made to WWII Medal of Honor recipient Rodger Wilton Young. During WWII as a small arms instructor, Sergeant Rodger Young was denied the opportunity to deploy with his unit when Japan entered the war. He requested that he be voluntarily demoted to private in order to see combat. His wish was granted. Career Sergeant Zim makes a similar request when Buenos Aires is destroyed. His wish is also granted; Again during WWII, Young gave his life in combat by single-handedly bombarding a Japanese machine gun position with rifle fire and grenades during an ambush, allowing his platoon to escape. While rescuing Carmen from the Brain-bug, Sugar Watkins gives his life in an almost identical fashion by laying down rifle fire and detonating the Nuke so his friends can escape; The starship that Carmen is assigned is also named the Rodger Young.