(at about 1:00:00 and 21:00 into the film) When the Humvee hits the wall and explodes, it becomes a mid-1960s Ford pickup truck.
(at about 1:00:00 and 1:00 into the film) After killing the rebel ninjas in the field, Frankenstein's score is shown as 255. He then kills another rebel on the road, which should give him 265. However, when the scoreboard is shown after reaching Checkpoint 2, his score is listed as 240.
(at about 50:00 into the film) When Minerva's car crushes Tammy's followers on her church grounds, the number of people that lay down to spell out the name "Tammy" and the number that remain after Minerva's car drives off do not match.
(at about 22:00 into the film) When Tammy drives off after killing Minerva's fans with her car, tire marks can be seen on some of their bodies as if she drove over them, but there is no evidence of her reversing her car on top of them.
(at about 1:00:00 and 24:00 into the film) An odd chicken was thrown into the final fight between Jed Perfectus and Frankenstein.
(at about 48:00 into the film) The stunt driver of the "autonomous" car A.B.E. is visible as the car pulls up to the gas station.