Starring: Arnold Schwarzenegger, Yaphet Kotto, Jim Brown, Maria Conchita Alonso
Other mistake: Damon, the game show host, is talking to an elderly lady who says she's rooting for Richards. Watch Damon's mouth. He's helping the actress by mouthing her words with her.
Revealing mistake: When Sub Zero is dying, you can see blood spurting. It should be coming from his neck, but it's actually coming from his gloves.
Damon Killian: Hi, cutie-pie. You know, one of us is in deep trouble. You know who I am?
Ben Richards: I've seen you before. You're the asshole on TV.
Damon Killian: That's funny. I was gonna say the same thing about you.
Trivia: When Killian is talking about the next possible contestant, he points out he's 120 pounds and wouldn't last 30 seconds. This is somewhat making fun of how they used Arnold Schwarzenegger to portray Ben Richards. In the book "The Running Man" (which has a very different structure), Ben Richards is described as "scrawny", the complete opposite of Arnold.
Question: How is Ben able to enter his brother's old apartment, now occupied by a single young woman, and still be able to shave off his beard and find a change of clothes?
Answer: When Ben is walking to the apartment door, he has a huge case with him which is big enough to hold clothes and even shaving equipment. Ben entered the door code into the keypad which unlocked the door so the code was never changed.