Stephen King and his wife Tabitha King played a spectator with a loud mouth opinion and a fairly messy face and his wife in the first scene at the fair. King was on the set because he working on the script for Creepshow: Arrepio do Medo (1982) with George A. Romero.
Apparently, George A. Romero has stated that the first cut of the movie ran for around a staggering 17 hours.
Director George A. Romero claims that the medieval pre-17th-century Europe tribute organization, the Society for Creative Anachronism, was an influence and inspiration for the movie.
The picture debuted in the year preceding the similarly-titled, popular, yet unrelated television series A Super Máquina (1982). Reportedly, the producers of Cavaleiros de Aço (1981) received a payment so the producers of A Super Máquina (1982) would be able to retain usage and not have to change their TV series title.
Stephen King: As "Hoagie Man," a spectator of the jousting tournament, as he makes a few sarcastic comments during the troupe's first performance while munching on a large sandwich.
Nick Tallo: (who played Jack, the biker with a seltzer bottle in Zombie - O Despertar dos Mortos (1978)) Appears as a bearded customer in a red shirt in the Big Dollar Offer Cafe scene.