The production had a hard time finding a horse for Wilt Chamberlain to ride because he was so tall that his feet touched the ground. They ultimately found one in Spain that was big enough and imported it to Mexico.

Wilt Chamberlain and Grace Jones didn't get along on set. Chamberlain had to keep asking Jones to turn down her boom box.

Six people controlled the Dagoth monster, working its arms, mouth, eyes, and body.

John Milius, the director of Conan the Barbarian (1982), was unavailable to direct this film. The studio took a more active role than they had on the first film, which led to some serious mistakes, according to Schwarzenegger in his latest autobiography. After the phenomenon of E.T. the Extra-Terrestrial (1982), Universal thought this film would make more money if it were family entertainment. Schwarzenegger argued against this change but they overruled him. Director Richard Fleischer agreed with Schwarzenegger, but complied with Universal's wishes to make this sequel more like a comic book. Although it out-grossed the first movie, it didn't do as well in the US because it was more family-friendly, just as Schwarzenegger and Fleischer feared. He later expressed the same fears in Terminator 2: Judgment Day (1991) when the Terminator was forbidden from killing anyone. Both Schwarzenegger and Dino De Laurentiis washed their hands of the series, with Schwarzenegger opting to only do contemporary movies from then on.

Wilt Chamberlain and Grace Jones did 90% of their own stunts.

André René Roussimoff: Aka, Andre the Giant (at around 1 h, 30 mins) as the resurrected horned giant.